a young orphan, it was the death of his parents during a Gamilus planet bomb attack on the Miura Peninsula that drove him to follow in his older brother Mamoru's footsteps and join the Earth Defence Force. He is initially hot-headed and prone to bursts of anger, and at first blames Captain Okita for the death of his brother in battle. However, he matures during the first season thanks to his responsibility as the Yamato 's battle chief, and ultimately Okita nominates him acting captain when he is unable to continue. Though apparently never formally promoted to captain, Kodai continues commanding the Yamato and her crew for most of the rest of the franchise, only relinquishing command twice: to Yamanami in Be Forever Yamato, and to a revived Okita during Final Yamato. He is also a talented pilot, flying his own Cosmo Zero fighter as the leader of the Black Tigers, and in the second season frequently joining the Cosmo Tigers in battle. His Japanese given name means "to go forward, to improve". In the 2010 live-action film, his story begins as a scavenger who left the Earth Defence Force five years ago when he blamed himself for redirecting a Gamilus bomb toward a space station, killing his parents and Daisuke Shima's wife. He re-enlists prior to the launching of the Yamato as the ship's gunner before eventually being promoted by Okita as acting captain. Though the Yamato succeeds in retrieving the means to restore Earth's surface, the remaining Gamilus ship cripples it before preparing a missile to destroy the planet. After ordering all surviving crew to abandon ship, Kodai sacrifices himself and the ship to destroy the missile and save Earth.
Yamadera Kouichi, Ono Daisuke, Tomiyama Kei