Books by Tadasu Kumagai
Nihongun no seishin kyōiku
Nihongun no seishin kyōiku
Nihon Kaigun wa naze yabureta
Nihon Kaigun wa naze yabureta no ka
Beigun tōgō ni nani o manabu k
Beigun tōgō ni nani o manabu ka
Motto shiritai Nihon Riku-Kaig
Motto shiritai Nihon Riku-Kaigun
Minzoku funsō o yomitoku
Kishō ga shōhai o kimeta
"Shōkai" Nihon Rikugun sakusen
"Shōkai" Nihon Rikugun sakusen yōmurei
Gungakkō, kyōiku wa shinazu
Gungakkō, kyōiku wa shinazu
Kiki kanri no shuwan
Kiki kanri no shuwan