This is a great example of the rare extended tang pole bayonet.

The pole bayonet was produced to be used as a last ditch weapon

to stave off the invasion of the Japanese home islands by the Allies.  The

idea was to mount the bayonet on a pole or a piece of bamboo so that it

could be used as a type of spear.  There is no provision for mounting on a rifle.

 This example was made by the Mukden arsenal and has the rare dark stained or thin painted Mukden scabbard that uses staples to hold the two sides of the scabbard together instead of using string or wire wraps.  Larry Johnson gave this variation the title of JB261 in his book "Japanese Bayonets".  Also, in his book, Larry stated that the known serial range for this variation is 636 to 3089.  Certainly, since he wrote his book, more examples have been reported.  This example is serial number 1391. Also note the lack of a throat piece on the scabbard.

Click HERE to see instructions for bayonet pole mounting.