Kōichi Saitō
Kōichi Nakano
Kōichi Mashimo
Kōichi Toyama
Kōichi Satō
Kōichi Morita (compositeur)
Kōichi Tōhei
Kōichi Chigira
Kōichi Okada
Kōichi Sugiyama (football)
Kōichi Kishi
Kōichi Hayashida
Kōichi Itagaki
Kōichi Wakata
Kōichi Sugiyama
Kōichi Yamamoto
Kōichi Tanaka
Kōichi Miura
Kōichi Ishii
Kōichi Tani
Kōichi Nakamura
Kōichi Hagiuda
Koichi Domoto
Koichi Fukaura
Kōichi Yamadera
Kōichi Kido
Kōichi Morishita
Kōichi Isoda
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 Zenigata
Koichi Kudo
(14445) Koichi