Ohnuma Hiroaki
Ohta Teruto
Ohtani Takeo
Ohyama Yukio
Oi Tsutomu
Oida Kyuya
Oka Yasuo
Okabayashi Masakatsu
Okada Yukiyoshi
Okamoto Yasuo
Okawara Kenjiro
Oksman Henry C.
Oku Toshio
Okubo Hideyo
Okubo Keigo
Okuda Kinnosuke
Okuhama Yoshiaki
Okuma Sadao
Okuno Chemical Industries Co. Ltd.
Okuno Chemical Industry Co. Ltd.