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Other Disclosures4186TOKYO OHKA KOGYO CO.,LTD.Materials and Chemicals

Notice Regarding the Start of Operations at the Aso Kumamoto Site of the Aso Plant

The newly established Aso Plant, Aso Kumamoto Site in Kikuchi City, Kumamoto Prefecture, has commenced operations. The site will expand supply capacity for high-purity chemicals and strengthen quality control and user support in western Japan.

Worth reading
48Recurring
0–100. This measures how worthwhile something is to read, not how good or bad the company is.
Direction
Improvement
Direction inferred from the company’s description.
Scale
130
¥100 million (approximate investment amount)
Wording
Definitive
How definitive the wording is.

Announced details

High-purity chemicals
Applicable field (uses covered by this announcement)

Semiconductor production, supply of high-purity chemicals, and quality control

Launch date8 June 2026 (operations commenced; actual)
What the company reported numerically
Quantitative Effects

Expansion of supply capacity, improved quality, and strengthened stable supply and user support systems in western Japan (figures: Not disclosed)

Location (as indicated in this announcement)

987-2 Asahi Shikawabe, Aza Nito-oki, Kikuchi City, Kumamoto Prefecture

Site area: 128 thousand m²
Impact on Business Performance

Already incorporated into the consolidated earnings forecast announced on 9 February 2026

The company does not address Contract Value / Offering price.

Announced details
ItemDetails
Names of Products / Services CoveredHigh-purity chemicals
Launch date8 June 2026 (operations commenced; actual)
Applicable areaSemiconductor production, supply of high-purity chemicals, and quality control
Location987-2 Asahi Shikawabe, Aza Nito-oki, Kikuchi City, Kumamoto Prefecture
Location scaleSite area: 128 thousand m²
Quantitative EffectsExpansion of supply capacity, improved quality, and strengthened stable supply and user support systems in western Japan (figures: Not disclosed)
Impact on Business PerformanceAlready incorporated into the consolidated earnings forecast announced on 9 February 2026
Items this document does not state (11)
CounterpartyCounterparty overviewRelationship with the CompanyContract ValueOffering priceContract DateAward/certification nameAwarding / certifying bodyRegistration number and expiry dateUsage historySource

These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.

The reasons the company gives

The company's own explanation, not something inferred from the numbers.

To address increased demand accompanying the expansion of semiconductor production in the Kyushu region and further strengthen the stable supply system.

How to read this page

This is not the documentKomori reads the disclosure the company filed and writes this summary. Figures are as stated by the company and are not audited.
Weight is not a verdictIt measures how much this changes what the company had already told the market. It is not a view on the shares.
Corrections happenIf the company reissues this disclosure, the page is rebuilt from the corrected version and the revision number moves up.
Notice Regarding the Start of Operations at the Aso Kumamoto Site of the Aso Plant | TOKYO OHKA KOGYO CO.,LTD. (4186) timely disclosure | Komori