AGC Minerals Corporation

In 1938: Established Tokai Industrial Co., Ltd. in Ugusu, Kamo Village, Kamo District, Shizuoka Prefecture, with 100% investment from Asahi Glass Co., Ltd. Capital: 1 million yen.

Tokai Kogyo Co., Ltd. established in Ugusu, Kamo-mura, Kamo-gun, Shizuoka Prefecture, with 100% investment from Asahi Glass Co. Capitalized at 1 million yen.

In 1939: Started production of伊豆 silica sand for flat glass.

Began production of Izu silica sand for sheet glass.

In 1958: Completed伊豆 plant special powder factory, started production of fine silica sand.

Completed Izu Silica Sand Plant and started production of fine silica sand.

In 1962: Built Nagoya plant in Obata, Toyota City, Aichi Prefecture, and started production of polishing silica sand.

Construction of Ohata Plant at Nagoya Works in Ohata-cho, Toyota City, Aichi Prefecture, and started production of silica sand for polishing.

In 1964: Started production of glass silica sand and feldspar at Nagoya plant using flotation separation method.

Nagoya Works started production of silica sand and feldspar for glass by flotation beneficiation method.

In 1965: Started selling伊豆 silica sand for lightweight foam concrete (ALC).

Started sales of Izu silica sand for lightweight foamed concrete (ALC).

In 1970: Increased capital to 400 million yen.

Increased capital to 400 million yen.

In 1974: Completed Yamatomura factory at伊豆 plant to strengthen ALC silica sand production, and started operation.

Completed and started operation of Yamamoto Plant at Izu Works to increase production of silica sand for ALC.

In 1986: Established Taiwan Eastern Industrial Co., Ltd. for glass raw material silica sand production in Taiwan.

Established Taiwan Tokai Koko (Taiwan) Co., Ltd. in to produce silica sand for glass.

In 1987: Started sales of building materials.

Started sales of building materials.

In 1988: Began trading business.

Started trading business.

In 1989: Completed Celstar factory at Nagoya plant and started operation.

Completion and operation of Celst 1986r Plant at Nagoya Works.

In 1991: Acquired Tokai Mining Co., Ltd., which mines and produces silica in Kuji City, Iwate Prefecture, jointly with Kawasaki Steel Corporation.

Toritsu Mining Co. a silica stone mining and manufacturing company in Kuji City, Iwate Prefecture, was acquired jointly with Kawatetsu Mining Co.

In 2006: Registered ISO 14001 as part of Asahi Glass Group's integrated EMS.

In 2006: Started handling Vietnamese silica sand.

Registered ISO14001 as Asahi Glass Group’s integrated EMS.

Started handling silica sand in Vietnam.

2007: Joint investment with JFE Minerals Co., Ltd. in Awano Stone Co., Ltd. in Koshima City, Tochigi Prefecture.

Joint investment with JFE Mineral Co., Ltd. in Awano Crushed Stone Co. in Kanuma City, Tochigi Prefecture.

Started handling Malaysian silica sand.

2009: Transitioned ISO 9001 registration from plant-specific to company-wide.

Company-wide registration of ISO9001 from factory to company-wide.

2014: Established Taiwan Tungkai Industrial Co., Ltd. in the Republic of China (Taiwan).

Establishment of Taiwan Tokai Industries, Ltd. in China (Taiwan).

2018: Started handling Malaysia silica sand.

2022: Established a Malaysia branch office in Malaysia.

Established Malaysia Representative Office in Malaysia.

2023: Changed company name to AGC Minerals Co., Ltd.

2023: Changed the company name of Taiwan Tungkai Industrial Co., Ltd. to AGC Minerals Taiwan Co., Ltd.

Changed the company name to AGC Mineral Corporation.

TAIWAN TOKAI KOGYO Co.,Ltd. changed the company name to AGC MINERAL Taiwan Co.,Ltd..

2024: Invested in and established Nishi-Izu Mori Energy Co., Ltd.

2024: Renovated offices at Tokyo headquarters and Toyota Technical Center.

2025: Obtained the 2025 Health Management Excellence Corporation certification (Ministry of Economy, Trade and Industry – Small and Medium Enterprise Division).