Yes,technically he does. In one of the later battles with lucemon, he sacrificed himself to help the others. While fading away, he gives his spirits to Kouji, allowing Kouji and Takuya to then evolve into Susanoomon.
Although in the real world, Kouichi does wake up from his comma. This occurred when Kouji and the others arrive at the hospital and Kouji, seeing Kouichi there releases a single tear falling onto Kouichi, waking him up in the process.
But technically, he was not dead when he went to the Digital World, he just had an out of body experience, until he woke up in the real world.
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Well in some Digimon web sites they say that Kouichi's older than Koji.**In the Original (Japanese), Kouichi says he is older. Kouji also refers to him as 'older brother'.**In America, there is no mention of whose older, because when it aired on tv all it said was that Koji and Kouichi are twin brothers.
The evolution theme in Digimon Frontier is called 'With the Will'.
In Digimon frontier I don't remember Takato being there.
Digimon Frontier.....SPIRIT EVOLUTION YEAH!
Digimon frontier 2 won't come out because there were too many complaints about humans turning into digimon (everyone's a critic).