| February 1927 |
Started business as a private proprietorship in Ono-cho, Ibi-gun, Gifu Prefecture |
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| October 1942 |
Original office relocated to Godo-cho, Anpachi-gun, Gifu Prefecture |
| February 1948 |
The organization changed to a joint-stock company |
| January 1950 |
Construction began for the Kumamoto Plant, which started its operation in July |
| May 1957 |
Incorporated as Kodama Basket Manufacturing Co., Ltd |
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| June 1964 |
Construction began for the main plastic molding plant, which started its operation in October |
| December 1968 |
Construction began for a plastic molding plant in the Kumamoto Plant, which started its operation in July the following year |
| May 1969 |
Company name changed from Kodama Basket Manufacturing Co., Ltd to KODAMA PLASTICS Co., Ltd. |
| March 1972 |
Construction began for the Yokoi Plant, which started its operation in November |
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| 1975 |
Development and commercialization of the rigid liners for the composite drums |
| 1977 |
Development and commercialization of agricultural chemical tanks (product name: TAMALORRY) |
| 1979 |
Development and commercialization of solar water heaters (hot water container) |
| February 1980 |
Entered into license agreement with MAUSER (Germany) |
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| July 1980 |
Construction begun for the Tochigi Plant, which started its operation in May the following year |
| 1981 |
Development and commercialization of garbage compost containers (product name: GOMIKIERU) |
| 1984 |
Development and commercialization of empty glass bottle collection containers (product name: empty glass bottle post) |
| 1985 |
Development and commercialization of large-size garbage collection containers (product name: POISTAR) |
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| 1987 |
Development and commercialization of seedbed transporting racks |
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| March 1987 |
Sign an exclusive contract with MAUSER (Germany) on manufacturing, manufacturing equipment, and sales of open-top and tight head drums. |
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| 1988 |
Development and commercialization of portable toilets |
| 1989 |
Development and commercialization of grain storage tanks (product name: grain bank) |
| 1990 |
Obtained UN certification (achieved by complying with the rules and regulations of the United Nations, International Maritime Organization) |
| August 1995 |
Obtained ISO9002 certification (Head Office Plant / Yokoi Plant) |
| December 1995 |
Construction began for the Ikeda Plant (Ultra Clean Plant), which started its operation in September the following year |
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| October 1996 |
Kumamoto Plant obtained ISO9002 certification |
| January 1997 |
Tochigi Plant obtained ISO9002 certification |
| April 1997 |
Manufacturing and sales began for IBC (Intermediate Bulk Container, product name: Power Tote) under the license agreement with MAUSER (Germany) |
| 1998 |
Expansion and consolidation of ISO9002 (revised) |
| 2001 |
Development and commercialization of rainwater utilization tanks |
| May 2001 |
The second phase plant expansion of the Ikeda Plant |
| August 2002 |
Change of certification from ISO9002 to ISO9001 |
| February 2004 |
Obtained ISO14001 certification |
| May 2004 |
Manufacturing and sales began for IBC mid-size compound vessels (product name: Power Tote P) under the license agreement with FUSTIPLAST (Italy) |
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| November 2005 |
Tochigi Plant completion of IBC production line, production of Power Tote P began |
| January 2007 |
The third phase plant expansion of the Ikeda Plant |
| April 2010 |
Obtained UN certification for Japan's lightest tight-head drum 8.5 kg (PL200JW) |
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| January 2011 |
Activity began for obtaining OHSAS1800
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