Domestic: 19 production business bases and 38 non-production business bases
Overseas: 15 production business bases and 4 non-production business bases
Total: 76 bases

As of March 2007

* 1

The Kyoto Offices (including the Kyoto Ekimae Office in the San-o Kyoto Ekimae Building), Tokyo Head Office, Osaki Office, Nagoya Offices (including the Nagoya Fushimi Office), Osaka Office, Komaki AEC Office, and OMRON Keihanna Technology Innovation Center acquired collective certification.
The collective certification range also includes the following affiliated companies associated with the Kyoto Offices.
OMRON Network Applications Corporation (Kyoto), OMRON Business Associates Co., Ltd. (Kyoto), OMRON Creative Marketing Co., Ltd. (Kyoto), OMRON Finance Co., Ltd. (Kyoto), OMRON PERSONNEL SERVICE CO., LTD. (Kyoto)

* 2

The Kumamoto Office is included in the collective certification range of the Fukuoka Office.

* 3

OFE: OMRON FIELD ENGINEERING CO., LTD.
OFE's Head Office (Tokyo Office), Metropolitan First Branch (Chiba Techno Center), Metropolitan Second Branch (Saitama Techno Center), Tohoku Branch, Osaka Office, Kyoto Office, Central Shikoku Branch (Hiroshima Techno Center), Nagoya Office (Chubu Branch), Human Techno Communication Center, Hokkaido Head Office (Sapporo Office), and Kyushu Head Office (Fukuoka Office), excluding warehouses, respectively, acquired collective certification in 2006.

* 4

OSK: OMRON SOFTWARE CO., LTD.
OSK's Kawasaki Office, Kyoto Office (Head Office), and Kyushu Head Office acquired collective certification.

* 5

OMRON Entertainment Co., Ltd. Head Office acquired certification together with the Kyoto Offices.

* 6

FA Techno Corporation's Head Office and Ikejiri Office acquired collective certification.

* 7

* OKS: OMRON KANSAI-SEIGYO Corporation
OKS's Head Office, Keiji Office, Shinki Office, Wakayama Office, Kofu Office, and Tosu Office acquired collective certification.

* 8

OMRON Precision Technology Hokuriku Co., Ltd. Head Office acquired certification together with the Ikejiri Office.

* 9

OMRON (Shanghai) Co., Ltd. and Shanghai OMRON Automation System Co., Ltd. were merged into the newly formed OMRON (SHANGHAI) Co., Ltd. in fiscal 2005, and OMRON (SHANGHAI) Co., Ltd. newly acquired ISO14001 certification in January 2007.