Kōichi Nakano
Kōichi Saitō
Kōichi Mashimo
Kōichi Toyama
Kōichi Satō
Kōichi Morita (compositeur)
Kōichi Chigira
Kōichi Tōhei
Kōichi Sugiyama (football)
Kōichi Kishi
Kōichi Okada
Kōichi Hayashida
Kōichi Wakata
Kōichi Itagaki
Kōichi Yamamoto
Kōichi Sugiyama
Kōichi Tanaka
Kōichi Miura
Kōichi Ishii
Kōichi Tani
Koichi Domoto
Kōichi Hagiuda
Kōichi Nakamura
Koichi Fukaura
Kōichi Yamadera
Kōichi Kido
Kōichi Isoda
Kōichi Morishita
Kōichi Taira
Kōichi Saitō (photographe)
Fujii Kōichi
Kōichi Shiozawa
Kōichi Saitō (réalisateur)
Kōichi Imaizumi
Koichi Kawai
Kobayashi Koichi
Koichi Kawai (1886-1955)
Koichi Muramatsu
Koichi Fukuda
Koichi Wajima
Koichi Hashiratani
Koichi Misawa
Koichi Oita
Koichi Kudo
(14445) Koichi
Koichi Zenigata