| 1935 |
Established Nakase Kogyo Co.,Ltd. to develop gold,silver,antimony minerals. |
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| 1936 |
Changed company name to Nihon Seiko Co.,Ltd. |
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| 1948 |
Constructed the smelting plant and started manufacturing and sales of antimony trioxide and antimony metal.
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| 1952 |
Changed sources of raw materials from domestic mines to overseas supplies.
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| 1955 |
Commenced manufacturing and sales of the catalyst grades of antimony trioxide.
|
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| 1971 |
Commenced manufacturing sodium antimonate.
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| 1976 |
Constructed desulfurration plant and started manufacturing and sales of gypsum.
|
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| 1982 |
Started manufacturing and sales of PATOX-L (large particle size) and PATOX-U (small particle size).
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| 1985 |
Constructed large scale reduction furnace.
Celebrated the 50th anniversary of the company.
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| 1986 |
Constructed large scale metal furnaces to produce PATOX grades.
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| 1988 |
Increased company's capital to 1,018 million yen.
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| 1991 |
Introduced automatic packing and storing system.
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| 1992 |
Built new factory to accommodate the new special surface treatment facility.
|
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| 1997 |
Completed new office building at Nakase.
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| 1998 |
Completed new laboratory at Nakase.
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| 2000 |
Nippon Atomized Metal Powder Corporation (Noda City, Chiba Prefecture) became a subsidiary of Nihon Seiko through the acquisition of the major portion of that company's issued stock.
Nihon Seiko Co.,Ltd. accredited with ISO14001.
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| 2003 |
Nihon Seiko Co.,Ltd. accredited with ISO9001.
Purchased the antimony business including some plant facilities of Sumitomo Metal Mining Co.,Ltd. |
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| 2004 |
Completed production facilities of high purity antimony trioxide.
|
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| 2008 |
Completed acquisition of 100% issued stock
of Nippon Atomized Metal Powder Corporation |
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| 2009 |
Completed new technical center at Nakase |
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