|1938||Established Senju Lead Works Co., Ltd.|
|1939||Started the production of wire solder, solder bar, resin flux cored solder, and water lead pipes.|
|1944||Changed the company name to Senju Metal Industry Co., Ltd.|
|1956||Acquired the solder labeling qualifications as per the JIS qualifications (Headquarters.).|
|1963||Achieved success in the domestic production of sprinkler heads for fire extinguishers.
Acquired Type 1 Approval from the Fire Research Institute of Japan (currently, the National Research Institute of Fire and Disaster.).
|1966||Established a plant in Moka City, Tochigi, Japan.|
|1977||Developed the silver cored solder balls.|
|1979||Developed oilless Clean Metal bearings.|
|1980||Completed the development of the first fully automatic soldering machine.|
|1982||Completed the development of the first reflow oven.|
|1985||Started exporting solder manufacturing plants to China and entered into a technical partnership with Chinese manufacturers.|
|1990||Established manufacturing and sales bases in Malaysia.
Newly established the Iwate Plant (Senju Sprinkler Co., Ltd.).
|1997||Established Senju Comtek Corp. in California, United States.|
|2001||Started sales of the lead-free soldering material M705, which becomes a standard material of JEITA.|
|2002||Started full-scale production in Huizhou, China.
Established Senju Micro R&D Lab. (currently, Senju Giken Co., Ltd.).
|2004||Established SENJU METAL (THAILAND) CO., LTD.|
|2005||Completed the new Headquarters office building.|
|2006||Established SENJU KOREA CO., LTD.|
|2012||The construction of the new research building Nissin Lou inside the headquarter premises was completed.|
|2014||Acquired official membership in the EICC and the CFSI.|
|2015||Declared the complete discontinuation of conflict minerals use.
Started sales of LEO, the world's first Sn-Bi series and flux cored solder.
|2017||SENJU MANUFACTURING EUROPE S.R.O. started operation in the Czech Republic.|