Osaka Titanium Technologies Co., Ltd.

1937: Established as Osaka Special Steel Works

Established as Osaka Special Steel Works

1950: Reorganized into Osaka Special Steel Works Co., Ltd.

Reorganized into Osaka Special Steel Co., Ltd.

1951: Began research on titanium metal production

Started research on metal titanium manufacturing

1952: Completed Japan's first titanium test plant; Sumitomo Metal Industries Co., Ltd. participated capital; Changed company name to Osaka Titanium Manufacturing Co., Ltd.; Japan's first titanium plant; Stakeholders celebrate around sponge titanium produced at the test plant

Completion of Japan's first titanium test plant: Sumitomo Metal Industries Co., Ltd. participated capital: Changed trade name to Osaka Titanium Manufacturing Co., Ltd.: Japan's first titanium plant: Stakeholders rejoice around the sponge titanium produced at the test plant

Our predecessor, Osaka Titanium Manufacturing Co., Ltd., succeeded in industrializing sponge titanium manufacturing for the first time in Japan in 1952, and began its journey as a pioneer in the sponge titanium industry.

1953: Capital participation by Kobe Steel, Ltd.

Kobe Steel, Ltd. participated capital

1954: Completed a titanium plant with a monthly capacity of 25 tons; Titanium plant operational; First 1-ton batch produced from the reduction furnace; Titanium plant operational; Test pieces made from the above 1-ton batch

Completion of a 25-ton-per-month titanium plant: Titanium plant operation: First 1-ton batch drawn from the reduction furnace: Titanium plant operation: Test pieces made from the above 1-ton batch

1957: Started research and development of polysilicon

Start of polysilicon research and development

1960: Polysilicon plant inauguration; Started manufacturing polycrystalline silicon; Reactor for bulk polycrystalline silicon production; Started manufacturing polycrystalline silicon; Silicon polycrystals produced in the above furnace

Polysilicon plant commissioning ceremony: Start of multicrystalline silicon production: Reactor for bulk multicrystalline production: Start of multicrystalline silicon production: Silicon multicrystal produced in the above furnace

1961: Completed magnesium chloride electrolysis plant; Magnesium chloride electrolysis plant; Inside the electrolysis plant

Completion of magnesium chloride electrolysis plant: Magnesium chloride electrolysis plant: Inside the electrolysis plant

1967: Completed second electrolysis plant phase 1; Awarded the Okouchi Memorial Production Award for titanium manufacturing technology; Completed 14 silos for titanium raw material

Completion of second electrolysis plant phase 1: Awarded the Okauchi Memorial Production Award for development of titanium manufacturing technology: Completion of 14 silos for titanium raw material

1975: Completed 80,000-ampere electrolysis cell; Subsidized by the Ministry of International Trade and Industry for integrated reaction separation; Completed 80,000-ampere electrolysis cell; The first 80,000-ampere electrolysis cell (electrolytic tank)

Completion of 80,000-ampere electrolysis cell: Ministry of International Trade and Industry subsidy for integrated reaction separation: Completion of 80,000-ampere electrolysis cell: The first 80,000-ampere cell (electrolytic tank)

1977: Completed reduction separation integrated furnace (2-ton unit); Completed flowing chlorination furnace; Flowing chlorination furnace; Flowing chlorination furnace

Completion of reduction separation integrated furnace (2-ton unit): Completion of flowing chlorination furnace: Flowing chlorination furnace: Flowing chlorination furnace

1978: Started operation of titanium integrated furnace (5-ton unit) (U furnace); Titanium integrated furnace operation; The first 4-ton batch produced in the integrated furnace; Developers

Operation of titanium integrated furnace (5-ton unit) begins (U furnace): Titanium integrated furnace operation begins: The 4-ton batch produced in the first integrated furnace and: Developers

1980: Completed the first new type electrolytic cell (multi-polar cell system)

First new type electrolysis cell completed (multi-polar cell method)

1981: Completed titanium melting plant; Completed titanium distillation plant; Titanium melting plant; Completed titanium melting plant

Completion of titanium melting plant: Completion of new titanium distillation plant: Titanium melting plant: Completed titanium melting plant

1982: Completed new sponge titanium plant; Held inauguration ceremony for new titanium product plant; New sponge titanium plant; Completed new sponge plant (3S plant)

Completion of new sponge titanium plant and inauguration of new titanium product plant: Completed new sponge titanium plant: Completed new sponge plant (3S plant)

1984: Completed first phase of polysilicon plant

First phase of polysilicon plant completed

Merged with Kyushu Electronic Metals Co., Ltd. in 1992

Merged with Kyushu Electronic Metals Co., Ltd.

Changed trade name to Sumitomo Sitix Corporation in 1993

Changed trade name to Sumitomo Switch Co., Ltd.

In 1996, the headquarters and Amagasaki factory obtained ISO9002 certification

Headquarters and Amagasaki plant obtained ISO 9002 certification

In 1997, Sumitomo Sitix Amagasaki (a wholly owned subsidiary of Sumitomo Sitix Corporation) received the business transfer of the Amagasaki manufacturing and technical headquarters from Sumitomo Sitix Corporation, focusing on business (titanium, polysilicon, development products), and changed the trade name to Sumitomo Sitix Amagasaki Co., Ltd.

Sumitomo Switch Amagasaki Co., Ltd. (wholly owned by Sumitomo Switch Co., Ltd.) received business transfer from Sumitomo Switch Co., Ltd., centered on Amagasaki Manufacturing and Technology Headquarters (businesses of titanium, polysilicon, and development products), and changed trade name to Sumitomo Switch Amagasaki Co., Ltd.

Obtained ISO14001 certification in 1999

Obtained ISO 14001 certification

Changed trade name to Sumitomo Titanium Co., Ltd. in 2002; completed expansion work at titanium electrolysis plant (from annual production capacity of 15,000 tons to 18,000 tons); listed on the Second Section of the Tokyo Stock Exchange; obtained AS9000 certification; migrated to ISO9001:2000

Changed trade name to Sumitomo Titanium Co., Ltd.: Increased titanium electrorefining plant capacity (from 15,000 tons/year to 18,000 tons/year): Listed on Tokyo Stock Exchange Second Section: Obtained AS9000 certification: Transitioned to ISO 9001:2000

Listed on the First Section of the Tokyo Stock Exchange in 2005

Listed on the First Section of the Tokyo Stock Exchange

Enhanced sponge titanium annual production capacity from 18,000 tons to 24,000 tons in 2006

Enhanced annual sponge titanium production capacity from 18,000 tons to 24,000 tons

Changed trade name to Osaka Titanium Technologies Co., Ltd. in 2007

Changed trade name to Osaka Titanium Technologies Co., Ltd.

Acquired business land in Kishiwada City, Osaka Prefecture in 2008; increased sponge titanium annual production capacity from 24,000 tons to 32,000 tons (actual production capacity 31,000 tons)

Acquired business land in Kishiwada City, Osaka Prefecture: Increased annual sponge titanium production capacity from 24,000 tons to 32,000 tons (actual production capacity basis 31,000 tons)

Established Kishiwada manufacturing plant in 2009; completed new titanium melting plant at Kishiwada manufacturing plant, increasing annual production capacity from 7,000 tons to 10,000 tons

Established Kishiwada Manufacturing Plant: Completed new titanium melting plant at Kishiwada Manufacturing Plant, increasing annual production capacity from 7,000 tons to 10,000 tons

Completed new polysilicon plant at Kishiwada manufacturing plant in 2011, increasing annual production capacity to 3,600 tons; increased sponge titanium annual production capacity from 31,000 tons to 37,000 tons (actual production capacity); further increased to 40,000 tons (actual production capacity)

Completed new polysilicon plant at Kishiwada Manufacturing Plant, increasing annual production capacity to 3,600 tons: Increased annual sponge titanium production capacity from 31,000 tons to 37,000 tons (actual production capacity basis): Increased annual sponge titanium production capacity from 37,000 tons to 40,000 tons (actual production capacity basis)

Increased polysilicon annual production capacity from 3,600 tons to 3,900 tons in 2012; achieved a total production of 500,000 tons of sponge titanium

Enhanced polysilicon annual production capacity from 3,600 tons to 3,900 tons: Achieved cumulative sponge titanium production of 500,000 tons

Consolidated polysilicon production system at Kishiwada plant in 2013 (changed annual production capacity to 3,000 tons)

Consolidated polysilicon production system at Kishiwada Manufacturing Plant: Changed annual production capacity to 3,000 tons

Consolidated titanium melting business at Amagasaki factory in 2014 (changed annual production capacity to 6,000 tons)

Consolidated titanium melting business at Amagasaki Plant: Changed annual production capacity to 6,000 tons

Achieved a total production of 600,000 tons of sponge titanium in 2016

Achieved cumulative sponge titanium production of 600,000 tons

Ended polysilicon manufacturing in 2018

Discontinued polysilicon manufacturing