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Hikari Seiki Seisakusho KK1
Precision Optical Manufacturing Corp.

That one sort of made sense but I never heard of them being called what you called it. It's also under Kokura supervision.

I...

Never heard of it, you sure you got the name right?

https://worldbayonets.com/Misc__Pages/Japanese_Bayonet_Markings/Japanese_Bayonet_Markings.pdf