i found this site.. Markings on Japanese Arisaka Rifles and Bayonets of World War II
which told me that this bayonet was made by National Denki (National Electric).... then i found this site Japan
which told me that "Made by Matshusita National Denki, under Kokura Army Arsenal supervision. Matshusita National Denki translates to Matsu****a National Electric Co. They were founded in 1918 to make consumer household electric apppliances and have evolved into the present-day Panasonic Corporation."
" Type 30
95th Series, late-war substitute-standard or "last-ditch" Type 30 bayonet. These bayonets went along with the 7.7 mm. Substitute-Standard Type 99 Short Rifle.
This example was made by the Hikari Seiki Seisaku-jo KK, under Kokura Army Arsenal supervision, in 1945. The 95th series was the final series produced by Hikari Seiki.
This bayonet exhibits the simplified manufacture typical of late-war substitute-standard bayonets:
Crude, unfullered blade;
Rectangular pommel; and,
Riveted, slab-sided grips.
The scabbard is a late-war wooden scabbard, held together with string. "
this means that if we can find it i can add a 7.7 mm. Substitute-Standard Type 99 Short Rifle to my collection!!