| 2012 |
February |
Seiki Okahata became the chairman of the Board and Shuhei Kitai was inaugurated as the President of the company. |
| 2010 | July |
Kisen Terminal Co., Ltd. unified Okahata Chemicals Co., Ltd. |
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| 2010 | January |
Two business groups become independent as Companies within the Company. |
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| 2009 | January |
Name of Chemtec International changed to Okahata(Shanghai) Trading Co., Ltd. |
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| 2008 | April |
Established Starport Japan Co., Ltd. |
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| 2007 | December |
Moved Chemtec International to Shanghai. |
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| 2006 | November |
Chemtec Chemical Co., Ltd. started production. |
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| 2005 | July |
Established Chemtec Chemical (Zhangjiagang) Co., Ltd. at Jiangsu Province, China. |
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| 2003 | January |
Established Okahata Hong Kong & Co., Ltd. at Hong Kong. |
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| 2002 | March |
Issued corporate bonds (2000 million yen). |
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| 2002 | February |
Capital was increased to 99.36 million yen. |
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| 2001 | October |
Capital was increased to 86.4 million yen. |
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| 2001 | July |
Established Okahata Korea & Co., Ltd. at Seoul, Korea. |
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| 2001 | March |
Shanghai Office was reorganized to Chemtec International. |
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| 1997 | April |
Moved Tokyo Branch to the present Shinkawa Iwade Bldg. at 1-chome, Shinkawa, Chuo-ku, Tokyo. |
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| 1997 | January |
Taichung Branch was separated and made independent as Taiwan Okahata & Co., Ltd.. |
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| 1996 | August |
Nagoya Branch was separated and made independent as Okahata Tokai Co., Ltd.. |
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| 1996 | February |
Okahata Chemicals Co., Ltd. was established handling plastic packaging products separated from Okahata & co., Ltd.. |
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| 1996 | January |
Okahata Textile Chemicals Co., Ltd. was established handling textile dyestuff chemicals separated from Okahata & Co., Ltd.. |
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| 1994 | July |
Opened Taichung Branch by moving Taipei Office to Taichung, Taiwan. |
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| 1993 | February |
Opened Shanghai Office at Shanghai, China. |
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| 1986 | November |
Opened Taipei Office at Nan Jing Tung Road, Taipei, Taiwan. |
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| 1981 | March |
Keigo Okahata became the chairman of the Board and Seiki Okahata was inaugurated as the President of the company. |
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| 1974 | March |
Osaka Office was promoted to Osaka Branch. |
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| 1964 | October |
Built Osaka Office at 5-6, Shimanouchi, 1-chome, Chuo-ku, Osaka. |
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| 1963 | December |
Name of the company changed to Okahata & Co., Ltd. |
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| 1962 | June |
Opened Tokyo Liaison Office at Yarai-machi, Shinjyuku-ku, Tokyo. |
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| 1952 | January |
Opened Osaka Liaison Office at 2 chome, Hiranomachi, Higashi-ku, (present Chuo-ku), Osaka. |
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| 1951 | January |
Established Okahata Shoten Co., Ltd. with 1 million yen capital. |
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| 1946 | January |
Keigo Okahata founded the business as Okahata Shoten in Wakayama city. |
