About us
History
Nippon Silica Glass Co., Ltd., the predecessor of Tosoh Quartz Corporation, was established in 1936 as the first silica glass manufacturer in Japan. We have been engaged in processing silica glass ever since.
| 1936 | Nippon Silica Glass Co., Ltd. established |
|---|---|
| 1937 | Operation of Yamagata Factory begins |
| 1969 | Manufacture of optical cells begins |
| 1970 | Operation of Tachiyagawa Factory (Present Yamagata Headquarters / Yamagata Factory) begins |
| 1971 | Successfully developed synthetic silica glass |
| 1982 | Kita-nihon Sekiei Co., Ltd. (currently Sakata Factory) established |
| 1983 | Cotec Co., Ltd. (currently Sakata Factory) established |
| 1994 | ISO9002 certified |
| 1996 | Yamagata Factory relocated and consolidated with Tachiyagawa Factory |
| 2000 | Company becomes wholly-owned subsidiary of Tosoh Corporation |
| 2001 | Corporate name changed to TOSOH Quartz Corporation |
| Operation of Yonezawa Factory begins | |
| Tainan Quartz Co., Ltd. Established | |
| Manufacture of LCD Mask Substrate begins | |
| ISO14001 certified | |
| 2002 | ISO9001 (2000 Version) certified |
| 2005 | ISO14001 (2004 Version) certified |
| 2009 | OHSAS18001 (2007 Version) certified |
| 2013 | Received “Kurumin” certification from the Ministry of Health, Labor and Welfare in recognition of our commitment to providing child-care services for our employees. |
| 2017 | Korea business office established |
| 2018 | Name of our Taiwan subsidiary company changed from Tainan Quartz Co., Ltd. to Tosoh Quartz Co., Ltd. |
| Yamagata Factory opens new manufacturing facility | |
| 2019 | |
| New Yonezawa Plant operation started | Tosoh Quartz Co., Ltd. Start of operation of new building of Tainan factory |
| Tohoku office, Hokuriku office opened | |
| Transfer headquarters functions from Yamagata to Tokyo | |
| Tosoh Quartz Korea Co., Ltd. established | |
| 2020 | Certified “Yamagata Child Care/Nursing Care Dynamic Support Company” |
| Sendai office opened | |
| Tosoh Quartz Co., Ltd. expansion | |
| 2021 | Tosoh Quartz Korea Co., Ltd. operation started |
| 2022 | Yonezawa Factory expansion |
| 2023 | Joined the Yamagata Ikuboss Alliance. |
| 2024 | Recognized as a “Diamond Smile Company” by Yamagata’s Smile Company Certification System. |