| August, 1947 |
The founder establised Setdunan Toishi Co.,Ltd. in 1-26, Edobori, Nishi-ku, Osaka-city at a capital of one hundred eighty thousand yen.
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| November, 1968 |
Moved Head office in 2-8-18, Kyomachibori, Nishi-ku, Osaka-city.
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| February, 1976 |
Renamed corporate name to Setsunan Co.,Ltd.
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| March, 1986 |
Establised Kyoto sales office.
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| May, 1997 |
Establised Singapore branch office.
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| April, 2005 |
Establised Okayama sales office.
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| June, 2005 |
Increased capital to 35 million yen.
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| August, 2008 |
Established Tokyo sales office.
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| May, 2015 |
Established representative office in Phillipines.
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| July, 2025 |
Moved Head office and Osaka sales office in 4-5-17 Takaidahondori, Higashiosaka-shi.
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