Oniwa Naoyuki
Onoyama Masao
Ooba Shigekazu
Ooga Tomonari
Oohashi Kazuyoshi
Ooi Heng Ee
Ookuma Toshiyuki
Oooka Nobuya
Oosaki Keiji
Ooshima Takao
Oota Ken
Ootsuka Shinji
Ootuka Yuuzo
Orient Watch Company
Ornstein Jacob J.
Osakabe Kenichi
Osgood, Jr. Wayne Robert
Oshimi Takeo
Osman Paul Alexander
Ostwald Robert