| 1947 |
August 4th Founded with capital 180,000 yen |
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| 1956 |
Established Osaka Business Office |
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| 1960 |
Established Shimizu Branch Office |
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| 1960 |
Established Tokyo Branch Office |
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| 1993 |
Aoi Plastic Co., Ltd. became a wholly-owned subsidiary |
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| 1999 |
Merged Shizuoka Branch Office with Tokyo Branch Office |
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| 2002 |
Obtained ISO14001 Certification (JQA-EM2692) |
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| 2007 |
Established Sanwa Shoko (Shanghai) Trading Co., Ltd. in Shanghai, China |
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| 2007 |
Celebrated 60th Anniversary |
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| 2014 |
Moved to kusumoto building to rebuilt corporate headquarters building. |
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| 2015 |
New corporate headquarters building was completed, effective from Nov 30, 2015. |
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