O s co.,ltd.
O.b.system inc.
Oat agrio co.,ltd.
Obara group incorporated
Obayashi corporation
Obic business consultants co.,ltd.
Obic co.,ltd.
Ocean system corporation
Ochi holdings co.,ltd.
Odakyu electric railway co.,ltd.
Odawara auto-machine mfg.co.,ltd.
Odawara engineering co.,ltd.
Odk solutions company,ltd.
Oenon holdings,inc.
Ogura clutch co.,ltd.
Ohara inc.
Ohashi technica inc.
Ohba co.,ltd.
Ohishi sangyo co.,ltd.
Ohki healthcare holdings co.,ltd.
Ohmori co.,ltd.
Ohmoriya co.,ltd.
Ohmoto gumi co.,ltd.
Ohmura shigyo co.,ltd.
Ohsho food service corp.
Oi electric co.,ltd.
Oie sangyo co.,ltd.
Oiles corporation
Oisix ra daichi inc.
Oizumi corporation
Oji holdings corporation
Okabe co.,ltd.
Okada aiyon corporation
Okamoto glass co.,ltd.
Okamoto industries,inc.
Okamoto machine tool works,ltd.
Okamura corporation
Okamura foods co.,ltd.
Okano valve mfg.co.ltd.
Okasan securities group inc.
Okaya electric industries co.,ltd.
Okayama paper industries co.,ltd.
Okayamaken freight transportation co.,ltd.
Oki electric industry company,limited
Okinawa cellular telephone company
Okinawa financial group,inc.
Okuma corporation
Okumura corporation
Okumura engineering corp.
Okura industrial co.,ltd.
Okuwa co.,ltd.
Olba healthcare holdings,inc.
Olympic group corporation
Olympus corporation
Om2network co.,ltd.
Omikenshi co.,ltd.
Omron corporation
Onamba co.,ltd.
Onex corporation
Ono pharmaceutical co.,ltd.
Ono sokki co.,ltd.
Onoken co.,ltd.
Ontsu co.,ltd.
Onward holdings co.,ltd.
Oomitsu co.,ltd.
Ootoya holdings co.,ltd.
Open door inc.
Open house group co.,ltd.
Open up group inc.
Optex group company,limited
Optim corporation
Optimus group company limited
Optoelectronics co.,ltd.
Optorun co.,ltd.
Oracle corporation japan
Orchestra holdings inc.
Organo corporation
Oricon inc.
Orient corporation
Oriental chain mfg. Co.,ltd.
Oriental consultants holdings company limited
Oriental land co.,ltd.
Oriental shiraishi corporation
Origin company,limited
Original engineering consultants co.,ltd.
Orix corporation
Oro co.,ltd.
Orvis corporation
Osaka gas co.,ltd.
Osaka organic chemical industry ltd.
Osaka soda co.,ltd.
Osaka steel co.,ltd.
Osaka titanium technologies co.,ltd.
Osaka yuka industry ltd.
Osaki electric co.,ltd.
Osg corporation
Osg corporation co.,ltd.
Ota floriculture auction co.,ltd.
Otake corporation
Otani kogyo co.,ltd.
Otec corporation
Otsuka corporation
Otsuka holdings co.,ltd.
Oug holdings inc.
Outsourcing inc.
Oval corporation
O-well corporation
O'will corporation
Oyo corporation
Ozu corporation

Corporates and CSR Brands

CSR Brands
Obayashi And Sustainability
Ogaki Kyoritsu Bank And Sustainability
Oji Holdings And Sustainability
Olympus And Sustainability
Oriental Land And Sustainability
Orix And Sustainability
Osaka Gas And CSR
Otsuka Holding And Sustainability

Corporates
O.S. Engines
Obayashi Corporation
Odakyu Electric Railway
Oji Paper Company
Oki Electric Industry
Okinawa Development Finance Corporation
Okuma Corporation
Olfa Corporation
Olympus
Omron
Onkyo
OPA co. ltd.
Orient
Oriental Land Company
Orion Breweries
Orix
Osaka Gas
Osaka Titanium Technologies
Otsuka Pharmaceutical Co.