For a wealth of information on Japanese blades, as well as a visual treat, try Tomoyuki Ohmura's site on Japanese edged weapons.
Bayonets of Koishikawa (- 1935) and/or Kokura (1935 to 1945) arsenal(s) and "subcontractors"
Arsenal symbol is a stack of four canon balls seen from above.










Bayonets of Nagoya arsenal and "subcontractors" (1923 to 1945)
Arsenal symbol is two fighting fish profiles in a circle.














Bayonets of Jinsen arsenal (Inchon, Korea).
Arsenal symbol is a five pointed star with the Korean Royal Family crest inside.



Bayonets of Mukden arsenal (Mukden, Manchuria).
Arsenal symbol is two concentric circles with three equally spaced partial radii joining them. A rendition of the original Chinese arsenal symbol at Mukden.





Bayonets for the Special 99 Naval rifle.
The rubberized scabbard of the lower bayonet is more typical than the plain steel,
These are the only Japanese bayonets with a false edge on the upper surface of the tip of the blade


Training bayonets
No arsenal symbol and maybe no marks other than a serial number and maybe nothing. Dull and crude.




