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Occurring Fact4890Tsubota Laboratory IncorporatedPharmaceuticals

Notice Regarding Changes to the Accounting Auditor

The accounting auditor is scheduled to change from KPMG AZSA LLC to Grant Thornton Taiyo LLC upon the conclusion of the Annual General Meeting of Shareholders on 23 June 2026.

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Change in Accounting Auditor

Subject Entity

Tsubota Laboratory Incorporated (reporting company)

Occurrence23 June 2026 (scheduled date of change and date of the 14th Annual General Meeting of Shareholders)
This disclosure05/20/2026
Cause

Five years had already passed since the initial audit agreement was signed with the current audit firm, and the Company determined that it was necessary to comprehensively review its audit arrangements from a new perspective in light of its growth stage. The Company comprehensively considered the audit firm's understanding of the Company's business characteristics, audit quality, independence and the appropriateness of audit fees commensurate with the Company's size.

Outlook

KPMG AZSA LLC's term of office will expire upon the conclusion of the 14th Annual General Meeting of Shareholders scheduled for 23 June 2026, and Grant Thornton Taiyo LLC is scheduled to be nominated as the Company's new accounting auditor.

Event that occurred
ItemDetails
Event nameChange in Accounting Auditor
Date of occurrence23 June 2026 (scheduled date of change and date of the 14th Annual General Meeting of Shareholders)
Subject EntityTsubota Laboratory Incorporated (reporting company)
CauseFive years had already passed since the initial audit agreement was signed with the current audit firm, and the Company determined that it was necessary to comprehensively review its audit arrangements from a new perspective in light of its growth stage. The Company comprehensively considered the audit firm's understanding of the Company's business characteristics, audit quality, independence and the appropriateness of audit fees commensurate with the Company's size.
OutlookKPMG AZSA LLC's term of office will expire upon the conclusion of the 14th Annual General Meeting of Shareholders scheduled for 23 June 2026, and Grant Thornton Taiyo LLC is scheduled to be nominated as the Company's new accounting auditor.
Items this document does not state (20)
Date recognized / date notice receivedTarget Locations / ProductsAmount of Impact on Business PerformanceAccounting period in which recognizedImpact on Earnings ForecastType of litigation or proceedingCourt or authorityPlaintiffDefendantDate of filing / date of actionClaim amount / surcharge amountAmount of receivables at risk of non-collection or delayed collectionSuspended operationsScheduled resumption dateInvestigation structureMeasures to prevent recurrenceDirectors' and officers' liabilityVoting rights ownership percentage before the changeVoting rights ownership percentage after the changePlanned follow-up disclosure

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.

Five years have passed since the initial audit agreement was signed with the current audit firm. In light of the Company's growth stage, the Company reviewed its audit arrangements from a new perspective and, after comparing and considering factors including understanding of the Company's business characteristics, audit quality, independence and audit fees appropriate for the Company's size, determined that Grant Thornton Taiyo LLC was suitable.

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Notice Regarding Changes to the Accounting Auditor | Tsubota Laboratory Incorporated (4890) timely disclosure | Komori