Kwon Jin-Soo (Korean name: Hangul: 권진수, Hanja: 權真秀), more commonly kown as Jin, is married to Sun-Hwa Kwon and is one of the middle section survivors of Oceanic Flight 815. Before the crash, his marriage with Sun was deteriorating because of the work her father was making him do and their issues having children. On the Island, Jin proved to be very efficient in catching fish, providing food for the others but since he and Sun were the only survivors who didn't speak English, this caused a constant language barrier between them and the other castways. However, when it was revealed that Sun spoke English, he felt betrayed by his wife and directed his efforts toward helping Michael bulid the raft. Before leaving on the raft he reconciled with Sun, saying he was doing this to get them off the Island. After being attacked by the Others out at sea, Jin, Michael, and Sawyer washed up back on the Island where they met the Tail Section Survivors of the plane and made their way back to camp where he and Sun were reunited. Despite Jin's infertility, he and Sun were somehow able to concieve a child on the island and their marriage was made stronger. Eventually learning key words and phrases Jin became more a part of the group, participating in missions and aiding in setting off the trap set for the Others. After Jack called the "Kahana" for rescue, Sun managed to escape the Island on the helicopter with the rest of the Oceanic Six but Jin was left aboard the Freighter when a C-4 explosion destroyed it, leaving Sun to believe he was dead. After the Island was moved by Benjamin Linus and was flashing through time, Jin was later found unconscious on a piece of flotsam by Danielle Rousseau and her science expedition in 1988. He eventually met up with Sawyer and the rest of the survivors who were stuck in the 70's where he worked for the DHARMA Initiative as a Security Officer for 3 years, and learned to speak fluent English. With the hopes of being reunited with Sun, he aided Jack in his plan to change the past with the hydrogen bomb and after the detonation of Jughead, he time traveled to his original timeline of 2007 having survived the blast.
Jin-Soo Kwon was born into the peasant class in the fishing village of Namhae, on the Southern Coast of Korea. He grew up in a single parent household because his mother, a prostitute, abandoned him as an infant; it is unknown whether the man who raised him is his biological father. Jin was led to believe that his mother was dead, and was unaware that she had sex with many men and was still alive. Mr. Kwon, a fisherman, proudly raised Jin as his son. ("D.O.C.")
As is required of all Korean men, Jin served in the Korean Army. ("D.O.C.") After completing his service, Jin moved to Seoul to raise his standard of life and leave behind his proletariat past. There, he lived with his friend Tai Soo, and looked for work at nearby hotels. He was first employed as a kitchen helper and was promoted to waiter due to his hard work. He found another position at the Seoul Gateway Hotel, but was warned by Mr. Kim, the hotel owner, that his past would not be forgotten easily. Jin, however, quit his job after realizing the class-policing that accompanied the job. It was as Jin headed home that he bumped into Sun. ("...And Found")
The connection between them seemed instant, and it was not long before Jin asked Sun to marry him. Jin told Sun that his parents were dead to avoid calling attention to the disparity between their social upbringings. Before marrying her, Jin asked her father, Mr. Paik, for permission to wed. Mr. Paik told him he would have to work for him at Paik Automotive, and Jin said he was willing to do anything for "his dream," Sun.
At the wedding of Sun and Jin, Jacob told them both in Korean to cherish the time they had together and never let it go. He gently patted them each on the shoulder. After he left, Sun and Jin were both perplexed at who exactly he was, though Jin noted that his Korean was excellent. ("The Incident, Parts 1 & 2")
Before they could go on a honeymoon Jin had to devote six months to "management training." Sun was wary of this duty to her father, but Jin gave her a white flower and promised her the honeymoon she'd always dreamed of. ("...In Translation")
Shortly after their marriage, Jin's mother found Sun and blackmailed her. When Sun asked her father for the money, Mr. Paik told her that Jin would be working for him to pay off the debt. Later at their apartment, Sun caught Jin in a discrepancy about the date of his father's death, and they argued. The next day, Jin discovered the money Sun was going to give to his mother, but Sun told him it was from her father for furniture and a honeymoon. Jin asked Sun to give it back, and told her he could provide for her. Sun agreed, telling Jin that she loved him. ("D.O.C.")
Mr. Paik brought Jin into his world of corruption and mafia type dealings. ("House of the Rising Sun") Two months after he and Sun were married, Jin bought a stuffed panda as a gift to the newborn grandson of a Chinese ambassador as a sign of goodwill from Paik Heavy Industries. ("Ji Yeon")
Sun was increasingly against Jin's line of work, and their marriage became less stable. The relationship was shaken up even more by the fact that the two were unable to have a child. A doctor told them it was because of Sun, but later spoke to Sun on the street and told her Jin was infertile. Sun hid this fact from Jin. ("The Whole Truth")
On one job, Jin was sent to deliver a message to the Secretary for Environmental Safety, Byung Han. Jin verbally delivered the message, clearly misunderstanding what Mr. Paik meant. The Secretary was so overjoyed that he gave Jin a dog in return for his kindness, which Jin gave to Sun. When Mr. Paik found out Jin hadn't correctly delivered his message, he made Jin drive an assassin to the Secretary's house to let Jin know exactly what kind of message was supposed to be delivered. At the last second, Jin had to severely beat the Secretary to keep the hired assassin from killing him. During this visit, Jin overlooked what was on the T.V. at the time, a news story about a man winning the lottery.
When he entered his apartment and went directly to the bathroom, Sun asked him whose blood was on his shirt. She had to slap him to get a response. He glared at her and said, "I do whatever your father tells me to. I do it for us." This incident only hurt a marriage that was already unstable, for this caused Sun to mistrust Jin, and made Jin feel guilty for not being able to tell Sun about her father and what kind of man he really was. ("...In Translation")
Mr. Paik discovered that Sun having an affair with Jae Lee. To restore the Paik family honor, Mr. Paik ordered Jin to kill Jae Lee, though he didn't tell him why. Jin followed Lee to his hotel room, where he severely beat Jae Lee but could not kill him as he was supposed to. Instead, Jin told Lee to leave the country and disappear forever. Jae Lee could not do this and apparently opted for suicide. He jumped from his hotel window onto Jin's car, clutching the pearl necklace he had tried to give Sun. ("The Glass Ballerina")
With Jin still uncomfortable about his occupation as Mr. Paik's lap dog, he visited his own father in Namhae. Though a mere angler, his father's wisdom managed to convince Jin that his love for his wife was more important than anything her father could ever do to them. With that in mind, Jin followed his father's advice: after delivering two Rolex watches to Sydney and Los Angeles under Paik's orders, he and Sun would disappear together, to start a new life in America. ("...In Translation")
After delivering one of the watches in Australia, Jin prepared to board Oceanic Flight 815 to conduct his final job in L.A. before removing himself from his past completely. However, in the airport restrooms he encountered a man employed by Mr. Paik, speaking Korean, who warned him not to attempt to escape his current life; otherwise, there would be consequences. With little time to process this information, Jin returned to his wife and the two boarded their flight. ("House of the Rising Sun") ("Exodus, Part 2")
After crashing on the Island, Jin decided to isolate his wife and himself from the rest of the survivors. During their first encounter with rain on the Island, Jin pushed another survivor away from the debris he and Sun were hiding under, preferring to be alone. ("Pilot, Part 1")
Despite that, he caught fish and offered it to several of the survivors. Hurley declined in laughter, saying he was starving, but not hungry enough to eat that. Claire, on the other hand, agreed. After she swallowed, she suddenly felt her baby kicking, the first sign since the crash that it was alive. ("Pilot, Part 2")
As the water supply ran low, Jin traded some fish he caught for Sawyer's last water bottles for Sun to drink. Initially, Kate and Sayid assumed Jin stole the water bottles, but using crude sign language Jin explained that he got the water from Sawyer. ("White Rabbit")
During the first week, Michael found a Rolex watch and put it on because his old watch broke. Jin noticed this and attacked Michael over it. Sayid and Sawyer intervened, handcuffing Jin to a large section of debris. After Sun explained to Michael (revealing her secret that she could speak English) that the watch belonged to her father, and his wearing it was against Jin's honor, Michael used the ax to free Jin from his capture. Later that night, Jin and Sun moved to the caves. ("House of the Rising Sun")
On the day of the cave-in, Sun told Jin to have Jack look at his wrist because the remains of the handcuffs were causing a rash. Jin shrugged her off and told her to cover herself as she looked indecent. After Jack was trapped during the cave-in, Jin helped the other survivors to rescue him. ("The Moth")
When Shannon had an asthma attack, Sun and Michael attempted to find an herbal solution to help her. Jin noticed this and yelled at Sun for interacting with the other survivors, but Michael stood his ground and told Jin to back off, which he did. ("Confidence Man")
A few days later, Hurley began to feel ill as a result of not eating enough protein. He asked Jin to teach him how to fish, but the communication barrier caused Hurley to give up trying to get Jin to help him. While trying to fish, Hurley stepped on a sea urchin, and begged Jin to urinate on his foot, but Jin refused. That afternoon, Jin brought a demoralized Hurley an already cleaned fish as a gift. Hurley thanked him, and Jin walked away content. ("Hearts and Minds")
After Locke and Boone brought Claire back to camp after finding her confused in the jungle, things started tensing up because the survivors feared Ethan might return. Jin continued to fish daily, and one day Charlie ran into him in the jungle. Charlie told him there were safety in numbers and that they should stick together. Jin quieted Charlie because he heard something. A rock, thrown by Ethan, hitting Jin on the head, forcing him to collapse. Jin was brought back to the caves, and Sun tended to his head wounds. Jin blamed the other survivors for the incident, and complained that they were endangering Sun and himself. ("Homecoming")
As Sun became more comfortable with living on the Island, she put on a bikini and went down to the beach. Jin noticed this and covered her up with a towel, yelling at her for being indecent. Michael intervened, taking Sun's side. Later that night, the raft that Michael was building was set on fire, and everyone suspected Jin did it in retaliation for Michael trying to interfere in Jin and Sun's marriage. Sun discovered Jin had burned his hands and could not believe what Jin had done. Sawyer attacked Jin in the jungle and brought him back to camp for Michael to question. Michael demanded that Sun translate, but she played dumb. He began to beat Jin, but Sun yelled, in English, for him to stop. Everyone, especially Jin, was shocked that Sun could speak English. Jin seemed particularly hurt by her betrayal. Sun explained that Jin did not burn the raft, and everyone believed her and left. Later, Jin brought Michael wood to build a new raft as amends. ("...In Translation")
Michael, Sawyer, and Jin became the main builders of the second raft. Jin's inability to communicate caused some heated arguments, but overall they remained productive. ("Numbers") But, after some time, Jin became annoyed with Michael, and often yelled at him during the building of the raft. ("Deus Ex Machina")
When Claire went into labor in the woods, Kate asked Jin to get Jack to help deliver the baby. When Jin arrived at the caves, he told Sun what was going on, but because Jack was tending to a dying Boone, Jack could not go help Claire. Jack told Jin and Charlie to tell Kate she must deliver the baby. After Kate delivered the baby, Charlie and Jin celebrated a few feet away. ("Do No Harm")
Sun confronted Jin about ignoring her, and asked him if he would be going with Michael when the raft sailed. To Sun's dismay, Jin said he would. Sun then attempted to poison Jin's water so he would be too sick to leave with Michael; however, her plan backfired and Michael was accidentally poisoned when the water bottles got mixed up. Michael recovered and Jack revealed to Sun that he knew she was the one who poisoned the water. He promised not to tell anyone because there was no reason anyone else needed to know. Jack didn't know that Kate gave Sun the idea in a secret attempt to secure a place on the raft. ("Born to Run")
After the raft was completed, Jin joined Michael, Sawyer and Walt in their search for rescue, though not before reconciling with Sun. Sun even made Jin a notebook with words he would need to communicate with the other three on their journey with words such as 'starboard' and 'port.' ("Exodus, Part 1")
At sea, Jin was present when the Others attacked the raft and kidnapped Walt. Jin dove into the ocean after Sawyer, who was shot; just then, the raft was blown up by a Molotov cocktail. ("Exodus, Part 2")
After the raft was destroyed, Jin was heard screaming for the other two, but later when Sawyer and Michael grabbed onto pieces of the raft's wreckage, Jin was nowhere to be seen. On the North side of the Island, Jin washed ashore unconscious. Sawyer and Michael next saw Jin when they arrived on the beach that the Tailies were living on, and Jin runs to them yelling "Others." ("Adrift")
Mr. Eko knocked Jin and Sawyer out, and the three middle section survivors were put in Ana Lucia's tiger pit. When Eko threw Ana Lucia in to trick Sawyer, Michael and Jin, she stole their gun, and pointed it at them. Eko pulled Ana Lucia out of the pit, and the three survivors were left alone without a plan of escape. ("Orientation")
After a day or so, Ana Lucia let Michael and Jin out of the pit to talk to them and determine whether they were truly survivors of Flight 815. The Tailies believed Michael and Jin, and they, along with Sawyer, were taken to the Arrow, which was where the Tailies had been living. They were given food, and while the two groups ate on separate sides of the room, they were accepted as allies. ("Everybody Hates Hugo")
Jin, Michael, Sawyer and the survivors of the tail section decided to trek back to the safer side of the Island. Before leaving, they gathered food, with Jin distinguishing himself with his fishing abilities yet again. Libby ran in announcing that Michael had left. Jin figured he had gone to find Walt alone, and Jin and Eko set off after Michael while the remaining survivors headed for the camp. When the two heard something, Jin and Eko stopped walking and when Jin started again, Eko told him to stop. Jin heard rustling and, thinking it was Michael, went to investigate. A boar ran out and knocked him down a hill. Jin stopped near a dead body with a stake sticking out of his chest. Eko told Jin the man was named Goodwin. "Others?" Jin asked and Eko nodded his head. Later, Eko sensed someone coming, and he and Jin hid. Hidden in the bushes, they saw a procession of people go by in almost unearthly silence. They could only see The Others from the thighs down, all barefoot, all muddy, and the last, a child, was carrying a brown teddy bear on a cord. When Eko went back to find Michael's trail, Jin actually found Michael yelling his son's name. Eko appeared and tried to convince Michael to go back with them, but Michael wouldn't go. Jin told Michael that he would find Walt but should go with them now. ("...And Found")
When Jin, Michael, and Eko reunited with the other group trekking to the fuselage section's beach, Jin began worrying about Sawyer, who could barely walk. Jin demanded that Sawyer get water, and that the Tailies help carry him. Approaching the beach, they ran into Shannon, but Ana Lucia mistook her for an Other, and shot her to Michael and Jin's shock. ("Abandoned")
After shooting Shannon, Ana Lucia panicked and made Sayid, who was with Shannon, a prisoner. Eventually Ana Lucia let Eko take Sawyer to Jack, and later let Jin, Libby and Bernard go as well. Together, they made their way back to the main camp, and, after several days trekking, Jin was reunited with his wife. ("Collision")
After reuniting, Jin and Sun seemed content to be back together. Later that day, Locke used bolt cutters in the Swan to cut off the handcuff Jin had been wearing since his fight with Michael over the Rolex watch. ("What Kate Did")
Some time later, Michael left to search for Walt. Though Jin wished to help his friend, Sun convinced him to stay, saying she would not be able to handle the stress of worrying for him all over again. ("The Hunting Party")
Soon after, it became Jin's turn to worry about Sun, as she was attacked in her garden. Jin demanded a gun from Jack to protect his wife, but Jack refused. In the end, Sawyer stole all the guns in a 'long con.' ("The Long Con")
Sun continued to work in her garden, and when she refused to abandon it when Jin asked her to, Jin destroyed the garden in anger. Later, Jin tried to apologize for his previous actions by replanting whatever he could salvage, and Sun told Jin she was pregnant. This revelation appeared to bind the two together once more, as a baby would "change everything." ("The Whole Truth")
Surprised by a seemingly random supply drop, Jin, Sun and many other survivors immediately tried to claim as much as they could for themselves. Later that day, Hurley tackled Sawyer after the latter made fun of the former. Sun convinced an amused Jin to break up the fight, which he did. ("Dave")
When Bernard attempted to build an SOS sign, Jin was initially eager to help; however, when Bernard patronizingly criticized Jin's method, Jin left Bernard to build the SOS sign all himself. ("S.O.S.")
With their relationship now more stable, Jin and Sun accompanied Sayid on his mission to the other side of the Island in Desmond's boat. In addition to seeing the statue, Jin and Sun were aboard the ship when the discharge occurred. ("Live Together, Die Alone")
After waiting over a day on the sailboat for Jack, Kate, and Sawyer to return to them, Jin sparked an argument with Sun about returning to camp. Sun's defiance reawakened the issues between the two. Since Sun believed Jin does not understand them, she betrayed Jin by not telling him about Sayid's plan. After Jin revealed to Sun and Sayid that his English is much better than they assumed, Sayid handed him a gun, informing him about his plan. As Jin and Sayid wait at the Pala Ferry to ambush the Others, they hear gunfire from the boat, where Sun was hiding. As Jin & Sayid run to the boat, shooting erupts between the two survivors and the Others. Jin dives into the sea and finds Sun, who had managed to escape the Others by jumping into the ocean. Together once again, the couple decides they need to return to the camp with Sayid. ("The Glass Ballerina")
Several days after their return to camp, Jin quarreled with Sun over her attempts to teach him English. He went with Hurley in the jungle, and helped him fix the DHARMA van. During this time, Sawyer, who returned to camp with Kate, taught him some English phrases relating to women. ("Tricia Tanaka Is Dead")
The next day, after the survivors found a ping pong table in the jungle, Sawyer suggested a match, and if he wins, he will get his stash back. Jin came up with an idea, that if Sawyer loses, he must relinquish assigning nicknames for an entire week. Eventually, Sawyer lost, and had to keep his promise. ("Enter 77")
When Claire came up with an idea that might get them rescued, Jin and Sun helped her trap a seagull, as part of her plan to contact the outside world. Their try failed when Desmond interrupted, and made several shots in the air, claiming he was trying to hunt a boar. ("Par Avion")
Jin accompanied Hurley and Sawyer in their search for Paulo, after Nikki's sudden death. Jin found Paulo's body in the jungle, suggested that the Monster was responsible for the deaths, and helped Sawyer and Hurley bring his body back to camp. Jin attended their funeral with Sun. ("Exposé")
He also accompanied Desmond, Charlie, and Hurley on a "camping trip," following a vision of Desmond's, into the jungle during which they discovered Naomi.("Catch-22") When Mikhail unexpectedly showed up after Hurley fired the flare, Jin chased him into the jungle and fought hand-to-hand with the mysterious Other to subdue him. Later, when Desmond let Mikhail leave after treating the parachutist, Jin once again chased after him. He had discovered that Mikhail had taken the satellite phone, which the group then recovered from him. ("D.O.C.")
Back at the beach, Jin, Hurley, Charlie, and Desmond all attempted to maintain the secret of Naomi. Jin was also present when Sayid made his speech regarding Naomi and his distrust of Jack and Juliet. When the group listened to Juliet's recorded message to Ben, Jin did not understand the words, but realized that Juliet was talking about Sun. ("The Brig") ("The Man Behind the Curtain")
The next day, while he and Sun were helping wire the tents on the beach to explode (as part of Jack's plan to ambush the Others), he asked Sun what happened between her and Juliet. Rather than tell him the whole truth about her pregnancy and the jeopardy in which it put her, Sun simply told him that she saw their child on an ultrasound and that it was healthy. Jin was overjoyed by the news.
Later that day, as the group was preparing to leave camp and follow Danielle to the radio tower, Jin, Sayid, and Bernard were chosen to stay behind and detonate the dynamite planted in the tents when the Others' raiding party were to arrive. Because there was not enough time to finish wiring the tents as planned, the three of them were instructed to set off the dynamite by shooting it from far away. ("Greatest Hits")
Of the three, only Jin failed to shoot the dynamite. As a result, was captured by Tom and Pryce. When contacted by Ben, the captors were told to kill Jin to encourage Bernard and Sayid to start talking. Though Jin bravely told Bernard "No talk," Bernard revealed everything about their plan, and Jin's life was spared. Jack initially thought Jin had died when he heard three bullets over the radio while talking to Ben; however, this was a prearranged plan by Ben to shoot three bullets into the sand instead. Eventually, Hurley took the camp by surprise by driving the DHARMA van into camp, running over Pryce and scattering Tom and Jason. This ended the hostage situation. ("Through the Looking Glass")
Jin was present at the beach when Desmond returned to inform them of Charlie's death, and his final warning. Jin and the others at the beach set out to meet up with Jack and the others in the jungle. He happily reunited with Sun at the cockpit. Jin sided with Jack during the rift between the survivors. ("The Beginning of the End")
Two days later, he was still on the beach, looking at a map of New York with Sun. They were debating where to live, and Jin told her that he is learning English so they can live together in America; Sun, however, told him that she wanted to return to Korea. ("Eggtown")
After Desmond and Sayid left on the helicopter, Jin continued practicing his English with the other survivors, telling Jack that he was learning from both Sun and Sawyer, though he admitted that "Sun is better." Sun, meanwhile, confronted Daniel about the intentions of the people from the freighter, and when Sun decided not to trust them and set out for Locke's camp, Jin declared "Where Sun go, I go." In a last-ditch effort to stop them so Sun would still have a chance to leave the Island, Juliet told Jin about Sun's affair.
After refusing to confront Sun to talk about it, Jin went fishing on the outrigger with Bernard, who talked about the pressures of life on the Island with a wife, telling Jin about Rose's cancer, her desire to stay on the Island, and her reasons for staying on the beach anyway. Reminded of his own renewed love for his wife, Jin returned to Sun that night and forgave her, saying he understood, given the man he used to be. ("Ji Yeon")
A day later, Jin and Sun responds to Bernard's calls for help when a dead body washes ashore. The body is revealed to be that of Ray's, the freighter doctor. ("The Shape of Things to Come")
Jin along with Sun, Charlotte and Daniel agree to travel to The Staff station to collect medical supplies, when Jack who needs emergency surgery to remove his infected appendix. When they reach the station, Daniel gallantly offers to enter first to make sure that there isn't any danger. Jin remarks to Sun in Korean that he wonders if Charlotte knows that Daniel likes her, to which Sun replies "she's a woman, she knows." After gathering the supplies, the group returns to the beach where Jin confronts Charlotte. He reveals that he knows that she can speak Korean, as he noticed her listening to several conversations he and Sun were having. Though initially denying this, Charlotte finally caves after Jin threatens Daniel. Charlotte speaks to Jin in Korean, and asks him what he wants. He instructs her to make sure that Sun is on the helicopter when it leaves the island. She agrees to his proposal. ("Something Nice Back Home")
When Sayid returns on the boat, Jin and Sun are the first to board. While Sayid continues into the jungle, Daniel ferries Jin, Sun and three other redshirts to the Kahana. On arriving, they meet Michael. During a conversation, Jin reveals to Michael that he is speaking better English. After a call from Desmond, the three rush into the communications room to discover it's loaded with explosives. Sun walks back out onto the deck in shock. ("There's No Place Like Home, Part 1")
Jin helped Desmond and Michael attempt to render the C4 harmless by freezing the battery and trying to find the right wires to cut. When they realized an explosion was imminent, Michael was left to keep the battery frozen as long as possible. Jin returned to the deck of the Kahana, only to see the helicopter taking off with his wife, the other members of the Oceanic 6, Desmond, and Frank. He waved frantically for them to return for him, but neither his shouts nor Sun's were enough. The C4 exploded seconds later, taking half the ship with it, presumably killing Jin.("There's No Place Like Home, Parts 2 & 3")
Jin survived the explosion and his unconscious body, within the radius of the Island, floated on a piece of wreckage in the ocean for several days, and jumped unconsciously through time several times, before being discovered by Danielle Rousseau's science expedition team in 1988, who had been shipwrecked by a storm. Upon waking up on the beach, Jin was questioned by Montand, though his disoriented answers frustrated the Frenchman. Rousseau was eventually able to get Jin into revealing his name, before revealing her own, leaving a confused Jin to sort out when he was. ("The Little Prince")
On the beach, Jin tried to communicate with the expedition to see if they had seen a helicopter, but they dismissed his questions as ranting. Instead, they wanted to find a radio tower. Jin knew the location of the tower, and agreed to take them there, so that he may use it as a landmark to find his way back to the beach camp. While traveling through the jungle, however, the expedition was attacked by the monster, who killed Nadine and dragged Montand into a crevice in the ground under the Temple. Robert, Lacombe, and Brennan, hearing Montand's cries for help, followed the monster into the crevice, but Jin convinced the pregnant Danielle to stay out. Though she agreed, the sky soon began to flash and Jin was transported into the near future. Travelling to the beach, he found the corpses of Brennan and Lacombe, and witnessed Danielle's murder of Robert in self-defense. Danielle, believing that Jin was afflicted by the Sickness as well, attempted to kill him, but her shot missed and Jin escaped into the jungle, time-traveling once again.
After this jump, he was reunited with Sawyer, Locke, and the rest of their group, and continued with them to The Orchid. After Charlotte warned him to never let Sun return to the Island, Jin made Locke swear that he would not let Sun return. In case Sun asked questions, Jin gave Locke his wedding ring and give it to Sun as proof that he was dead, giving her no reason to return to the Island. Locke gave Jin his word. ("This Place Is Death")
After one more time shift, Jin found himself in 1974. While following Sawyer back to the beach, the group encounter Amy, who has been held captive by two Others. Jin helps carry Amy's dead husband back to her home, the Barracks. He is later captured and taken into DHARMA Initiative custody. Despite Horace Goodspeed offering to send them back to the mainland, the group end up becoming employees of the DHARMA Initiative. Jin is seen working on the security team.("LaFleur")
Three years later, Jin was still working in DHARMA security. He appeared to have become fluent in English. One day while driving a VW van, he encountered Jack, Kate and Hurley at the waterfall shortly after they had returned to the Island via Flight 316. Jin contacted head of security, Jim LaFleur, and took the three to meet him at the North valley. Sawyer then met them, and was reunited with the three. ("316") ("LaFleur")
Upon hearing that they had arrived on a plane, Jin set off to see Radzinsky at The Flame station, he demanded he check with the radar logs and the other stations that there had not been a plane. After Jin confirmed no plane (it was 30 years in the future), a Hostile was detected within DHARMA territory and Jin ran straight to apprehend said hostile. After discovering it was Sayid, he had to pretend to consider him a hostile, he and Radzinsky then took him to the flame and locked him up, Jin then called Sawyer to come and deal with the situation, secretly telling him it was Sayid when out of earshot from Radzinsky. ("Namaste")
Jin encountered Sayid and young Ben while driving the van after their escape from the DHARMA cell. Sayid lied to Jin, saying that Sawyer set him free. When Jin tried to call Sawyer on his walkie, Sayid knocked him unconscious.("He's Our You")
Jin later regained consciousness and found Ben's bleeding body. Jin placed Ben in the van and took him back to the Barracks. ("Whatever Happened, Happened")
The next day, after their cover was blown, Jin, Jack, Kate, Sawyer, Juliet, and Hurley met in Sawyer and Juliet's home to discuss their options. Sawyer suggested they either leave the Island by submarine or head into the jungle to "start from square one." Jin refused to leave as long as there was a possibility he might be reunited with Sun and Hurley supported staying. Jin, Hurley, Sawyer and Juliet decided to pack and head for the beach. As Jin and Hurley were walking out of their houses, they heard the alarm and saw Radzinsky and two other DHARMA members tromping into the barracks with guns. ("The Variable")
Jin, Hurley and Miles escaped the barracks and headed for the beach. Dr. Chang followed and asked if they're really from the future. Hurley finally admitted it and Chang revealed that he believed what Daniel had told him about needing to evacuate the entire Island. Later, Jin, Miles, Hurley watched people board the sub including Charlotte, her mom, Lara Chang and baby Miles. Jin said they should get moving, but then they saw Juliet and Sawyer, handcuffed and brought to the sub. ("Follow the Leader")
Jin, Miles, and Hurley went back to the Barracks and rescued Jack and Sayid from the shootout. When Jin asked Jack what was going on, Jack shared his plan might reunite him with Sun. They headed to the construction site of the Swan with the bomb. Jin stayed with Hurley and a severely injured Sayid, while Miles, Kate, Sawyer and Juliet helped Jack in a massive gunfight, and allowed Jack to drop the bomb into the pit. When the incident occurred, Jin was presumably still with Hurley and Sayid less than a mile away, but with the detonation of Jughead, he survived. ("The Incident, Parts 1 & 2")
Jack tended to Sayid and said that he could not save him. Hurley claimed he could and asked Jin to lead the way to the Temple. Sawyer and Miles stayed behind to bury Juliet. They arrived at the Temple wall and entered via the declivity at the base of the wall. The party was soon captured by the Others. They were taken to the Temple proper and were ordered to be shot. Hurley quickly told them that Jacob sent him with the guitar case. A Japanese man named Dogen, who was apparently leader of the Others at the Temple, opened the case and removed the Ankh and broke it. He removed a piece of paper, likely another of Jacob's lists. The Others then led them inside of the Temple to a large spring. They submerged Sayid in the spring. It appeared that they were drowning Sayid, and the survivors protested. Jin watched in horror as the Others removed Sayid's lifeless body from the spring and pronounced him dead. Jin and his friends were the brought food by Cindy, Zach, and Emma. Sawyer and Miles were soon brought to the Temple proper as well, after being caught by the Others. ("LA X, Parts 1 & 2")
Jin watched as Jack resisted when he was asked by Lennon, Dogan's interpreter, to come with him. Hurley then pointed out to the group that Sayid had come back to life. Jin was shocked. ("LA X, Parts 1 & 2")
When Sun went into labor, she called out for her husband in delirium, refusing to give birth without him. However, she eventually gave birth to Ji Yeon, the name Jin picked out for his child. After her recovery, Hurley came to Korea to visit Sun. Hurley and Sun visited Jin's grave, where Sun introduced her husband to his child, and recalled that she was calling out for him during labor. She then told him, through tears, that she missed him. ("Ji Yeon")
Jin's tombstone reads: 
The tomb of Kwon, Jin Soo
Date of birth: November 27, 1974
Date of death: September 22, 2004
Wife: Paik, Sun Hwa
[Sun's] date of birth: March 20, 1980
Around three years after leaving the island, Sun told Kate that if they hadn't left Jin behind on the freighter, they would probably all have died instead of just him. She also said she does not blame Kate for his death. ("The Lie")
On the dock, Sun held a gun to Ben's head, still blaming him for the death of Jin. Ben avoided getting shot by telling her that Jin was still alive, and he could prove it. Ben handed her Jin's wedding ring, which he had stolen after murdering John Locke. ("This Place Is Death") ("The Life and Death of Jeremy Bentham")
On the flight, Jin is transporting a watch to Los Angeles and is traveling with Sun-Hwa Paik, who is daughter of his employer. He later notices Sun smiling and asks why. She replies by pointing at Rose and Bernard, commenting how happy they seem to be. Jin then orders her to button up her sweater. He later stares at the watch he was supposed to deliver during the plane's landing. ("LA X, Parts 1 & 2")
At the airport, Jin is later questiond by customs about the watch and about the money they had.("LA X, Parts 1 & 2")
When Jin arrived on the Island, he had no knowledge of the English language, which left him alienated from the rest of the survivors. As time passed however, he slowly picked up words and phrases with the help of Sun. She also created a notebook to help him learn some simple English.
On the raft, he told Michael that he knew "starboard", "port" and "eat" and was the first to yell out "Rudder!" when the rudder broke off the raft.
Later, Sawyer taught Jin some "essential" phrases all women need to hear such as "I'm sorry", "You were right" and "Those pants don't make you look fat".
In addition to those phrases he has also learned a lot to please Sun. He knows how to say "I love you" and in "Through the Looking Glass" he replied to Sun's queries about why he was staying behind to blow up the dynamite by replying in English, "Because we have to go home."
As of Season 4, Jin can understand people speaking English better than he can speak it. He has come a long way with speaking however, finishing entire sentences without many pauses. He said he has Sun, and sometimes Sawyer, as a teacher.
Working for the DHARMA Initiative, he spent three years among English speakers and seems to be able to speak the language fluently. ("LaFleur")
Despite the language barrier, Jin tries to seek acceptance into the survivors by helping others through skills such as:
Jin is proficient in tae kwon do, the national sport of Korea. Meaning "the way of the hand and fist", tae kwon do employs various striking and kicking moves taking advantage of the leg's length to disable opponents. Jin dealt a spinning hook kick to Mikhail, which disabled him long enough for Jin to employ a sleeper hold. ("D.O.C.")