TOKYO OHKA KOGYO Co., Ltd. decided to open the "Aso Kumamoto Site" of Aso Plant as a new production base in Kikuchi City, Kumamoto Prefecture, Japan. A manufacturing plant of high-purity chemicals is currently under construction at the site, with operations scheduled to commence in the first half of 2025. The Company opened the Aso Plant (Aso City, Kumamoto Prefecture), in 1984 and has been manufacturing high-purity chemicals.

In 2022, company acquired new land for commercial use in Kikuchi City, Kum Yam Prefecture to open the Aso Kumamoto Site in response to the recent expansion of semiconductor production in Kyushu. In order to realize the vision set forth in TOK Vision 2030, the long-term vision announced in August 2020, TOK Group plans to make the largest-ever capital investments of more than JPY 60 billion over the three-year period covered by TOK Medium-Term Plan 2024 released in February 2022. Will continue to make aggressive capital investments and strengthen global supply chain to respond to the medium- to long-term growth of the semiconductor market.

Outline of the new Aso Kumamoto Site of Aso Plant: Location: Kyokushikawabe, Kikuchi City, Kumamoto Prefecture, Japan (on the premises of Kikuchi Techno Park), Site area: 128,773.74, Scheduled to commence operations: 1st half of 2025, Investment amount: Over JPY 13 billion (plan).