Japanese WWII Type 30 Bayonet, Kokura Arsenal, Navy Scabbard?

Original era manufacture. Bright finished, rounded birdhead pommel, hooked guard, and contoured wooden grips.The blade is clean, no corrosion issues, just some old staining from cosmoline, most of which will clean away with acetone. Mix of steel patina and blue to the guard and pommel. Original finish wooden grips displaying light marring and bumping from service use.Steel scabbard which is covered with an old battleship-gray paint, minor denting to the surface from service use. My vote is that this bayonet may have seen service with the Imperial Navy.