| History | |
| 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. |
JEITA: Japan Electronics and Information Technology Industries Association
EICC: Electronic Industry Citizenship Coalition