Factory/PlantMaterials & chemicals

Tokyo Ohka Kogyo completes new photoresist manufacturing building at Koriyama plant

Tokyo Ohka Kogyo Co., Ltd.Koriyama, FukushimaPublished Oct 9, 2026

Investment¥23B

PhaseCompleted

StartJul 2024

CompletionOct 8, 2026

Construction

Today

20252026

Completed.

Tokyo Ohka Kogyo completed a new manufacturing building for semiconductor photoresists at its Koriyama plant in Fukushima on October 8, 2026. The approximately ¥23 billion facility covers 4,800 sqm, will manufacture advanced materials including EUV and ArF photoresists, and is scheduled to begin operations in November 2026.

Project facts

Owner: Tokyo Ohka Kogyo Co., Ltd.
Listing: 4186 Tokyo
Facility: Factory/Plant
Sector: Materials & chemicals
Location: Koriyama, Fukushima, Japan
Investment: ¥23B — total
Scale / capacity: 4,800 sqm building area
Construction start: Jul 2024
Completion: Oct 8, 2026
Announced: Oct 8, 2026
Themes: semiconductor-supply-chain

Figures and schedules are as announced by the company or the public body concerned; plans can change. Amounts that were not disclosed are recorded as not disclosed, never estimated.

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