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1961
May
- Established by Kenzo Miyawaki, located in Osaka city.
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1966
August
- Expansion of Fe-Si-Mg Plant and Head Office were completed.
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1971
October
- Acquired a Fe-Si Plant in Katsuyama city and started OTG Katsuyama Plant producing Fe-Si and Fe-Si-Mg alloyintegratedly.
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1973
October
- Established a joint-ventured Fe-Si plant in Brazil, named as "INONIBRAS" - Inoculantes e Ferroligas Nipo-BrasileirosS/A, Piropora.
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1981
March
- Concluded Sole Agency Agreement with Rio Tinto Iron &Tianium for sale of their foundry use Pig Iron.
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1996
October
- Built Osaka Factory organizing sizing and packing lines.
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1996
March
- Established a joint-ventured ferroalloy plant in China, named as Nanjing Ninban Special Alloy Co., LTD, Nanjing.
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1997
May
- Removed Head Office to Nakashima Nishiyodogawa-ku, Osaka city.
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2004
September
- Removed Head Office to Umeda Kita-ku, Osaka city.
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2005
February
- Katsuyama Factory (Takashima Factory, Osaka Factory) acquired ISO 9001 certification.
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2006
September
- Katsuyama Factory and Takashima Factory acquired ISO 14001 certification.
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2007
January
- Build "Cored Wire" Plant in Katsuyama and started producing.
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2012
March
- Established Takashima Factory in Katsuyama city.
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2020
June
- Established Dangerous Goods Warehouse in Takashima Factory.
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2020
August
- Established Office Building and Warehouse Building in Katsuyama Factory.
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2022
January
- Transferred the shares of INONIBRAS S/A to RIMA S/A, our business partner in Brazil.The special partnership with INONIBRAS S/A has been maintained.
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2023
March
- Established a joint-ventured ferroalloy plant in China, named as Jiangsu Ningban Special Metal Materials Co., LTD, Liyang.
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2024
April
- Declaration of Partnership Building
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2024
October
- Removed Head Office to JP TOWER OSAKA (Umeda Kita-ku, Osaka city).