| 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. |
| 1963 |
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. |
| 1990 |
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. |
| 2002 |
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. |
| 2015 |
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. |
