| 1669 |
SASAYA (hardware store) was founded by OKAYA Sosuke-Muneharu at Teppo-cho (where present Head Office is located), Nagoya |
| 1937 |
Okaya Shoten Co., Ltd. was founded |
| 1943 |
 Changed corporate name to Okaya & Co., Ltd. |
| 1952 |
Tokyo Office (presently Tokyo Head Office ) was relocated to Shin Marunouchi Building |
| 1964 |
Established Okaya (U.S.A.), Inc. as a subsidiary |
| 1967 |
Annual turn over exceeded 100,000,000,000yen |
| 1974 |
Established a subsidiary in Thailand (Siam Suriya Co., Ltd.) |
| 1982 |
Established a subsidiary in Singapore (Okaya Singapore Pte. Ltd.) |
| 1986 |
 Okaya Building (Head Office) was built |
| 1990 |
OKAYA Tokuichi assumed President |
| 1995 |
I.P.O. listed at NSE-2nd section (corporate capital was increased to 7,852yen billion) |
| 1997 |
Transferred to NSE-1st section (corporate capital was increased to 9,128yen billion) |
| 2000 |
ISO14001 was approved |
| 2000 |
Established Okaya (Shanghai) Co., Ltd. in China as a subsidiary |
| 2001 |
Established Okaya & Co., Ltd., Manila Office in the Philippines |
| 2002 |
Established Okaya (Korea) Co., Ltd. as a subsidiary |
| 2004 |
ISO9001 was approved |
| 2004 |
Joined "The Henokiens", Association of family and bicentenary companies |
| 2005 |
Established Okaya (Guangzhou) Co., Ltd. in China as a subsidiary |
| 2005 |
Established Okaya (Tianjin) Co., Ltd. in China as a subsidiary |
| 2005 |
Established Okaya & Co., Ltd., Ho Chi Minh Office in Vietnam |
| 2006 |
Established Okaya (Beijing) Co., Ltd. in China as a subsidiary |
| 2006 |
Established Poland Tokai Okaya Manufacturing Sp. z o.o. as a subsidiary |
| 2007 |
Established Okaya (Thailand) Co., Ltd. as a subsidiary |
| 2007 |
Established Okaya Hokkaido Co., Ltd. as a subsidiary |
| 2007 |
Established Mex Okaya-TN, S. de R.L. de C.V. in Mexico as a subsidiary |
| 2008 |
Established Okaya & Co., India Pvt. Ltd. as a subsidiary |
| 2008 |
Established Okaya Kyushu Co., Ltd. as a subsidiary |
| 2009 |
Established Okaya & Co., Ltd., Middle East Office in U.A.E. (Dubai) |
