Kōichi Dōmoto Kōichi Hashiratani Kōichi Oita Kōichi Morishita Kōichi Hashimoto Kōichi Sugiyama Kōichi Hirakida Kōichi Sugiyama (calciatore) Kōichi Kobayashi Kōichi Tanaka Kōichi Kudō Kōichi Satō Koichi Tohei Kōichi Mashimo Koichi Wada Koichi Zenigata Kōichi Tōchika Kōichi Itagaki Kōichi Yamadera Koichi Kidera Koichi Fukuda Koichi Nakano Koichi Wajima 14445 Koichi Koichi Wakata Kōichi Yamamoto Kōichi Shiozawa Koichi Nishiyama Diamond Is Unbreakable Personaggi di Digimon Frontier