Sun later buys a controlling share of her father's company as retribution for, in her view, his hand in Jin's death. Sun names her daughter Ji Yeon as Jin had asked. Jin's grave in Korea lists the date of the plane crash (Sept 22, 2004) as the date of his death.

What happen to Jin in Lost?

It was the sigh of relief heard 'round the “Lost” universe: Jin is alive! He's alive! When “Lost” viewers last saw Daniel Dae Kim's Jin, he was standing on a freighter that exploded, as his wife, Sun, watched from a helicopter. ... The producers assured fans last season that Jin would be seen again -- in life or death.

How did Sun and Jin die on Lost?

Jin returned to the Island, time traveling to 1974, where he joined the DHARMA Initiative as a security officer for three years. He returned to 2007, where he reunited with Sun. They tried to leave the island on a submarine. It sank, and the two drowned together.