Komori
Other Disclosures4890Tsubota Laboratory IncorporatedPharmaceuticals

Effect of violet light exposure on cognitive function in senior dogs

A pilot study was conducted in which 7 aged dogs were exposed to violet light for 3 hours per day for 1 month to examine its effects on cognitive function and physical activity. No statistically significant overall changes were observed, but improvements were seen on an individual basis in cognitive function in 6 of the 7 dogs and in physical activity in 2 of the 7 dogs.

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48Recurring
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Direction
Mixed performance
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Scale
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Wording
Avoiding a definitive answer
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Announced details

Violet-light (VL) exposure
Applicable field (uses covered by this announcement)

Exploration of the effects on cognitive function and physical activity in aged dogs

What the company reported numerically
Quantitative Effects

Cognitive-function assessment indicators showed improvement trends in 6 of 7 dogs, while physical activity increased in 2 of 7 dogs. No statistically significant changes were observed across the study population.

Usage history

The subjects were 7 aged dogs, 14–16 years old.

Relationship between the counterparty and the company
Tsubota Laboratory Incorporated4890
Relationship with the Company

Joint Research

CounterpartyAzabu University and others

Azabu University and others are listed. Other information, including location, representative, business description, capital and year of establishment, is Not disclosed.

In this announcement the company addresses none of Contract Value / Offering price / Impact on Business Performance.

Source (materials cited by the company)

Frontiers in Veterinary Science (paper URL and DOI: 10.3389/fvets.2026.1890157)

Announced details
ItemDetails
Names of Products / Services CoveredViolet-light (VL) exposure
CounterpartyAzabu University and others
Counterparty overviewAzabu University and others are listed. Other information, including location, representative, business description, capital and year of establishment, is Not disclosed.
Relationship with the CompanyJoint Research
Applicable areaExploration of the effects on cognitive function and physical activity in aged dogs
Quantitative EffectsCognitive-function assessment indicators showed improvement trends in 6 of 7 dogs, while physical activity increased in 2 of 7 dogs. No statistically significant changes were observed across the study population.
Usage historyThe subjects were 7 aged dogs, 14–16 years old.
SourceFrontiers in Veterinary Science (paper URL and DOI: 10.3389/fvets.2026.1890157)
Items this document does not state (10)
Contract ValueOffering priceContract DateLaunch dateAward/certification nameAwarding / certifying bodyRegistration number and expiry dateLocationLocation scaleImpact on Business Performance

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.

The study was conducted as part of exploratory research to expand the company’s violet-light research in the ophthalmic field into nonvisual areas, including cognitive function. It was supported by the Go-Tech project of the Ministry of Economy, Trade and Industry and the Small and Medium Enterprise Agency.

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Effect of violet light exposure on cognitive function in senior dogs | Tsubota Laboratory Incorporated (4890) timely disclosure | Komori