I disagree that this is a chop job done by Bubba. Here is an article by nambu world on the type 2 and Ian McCollum with one in an early forgotten weapons video.
Nambu World: Arisaka Type 2 Paratroop Rifle
I'm going to have to do some research to find a schematic for this rifle, but everything about the rifle I own matches everything I can find so far with authentic type 2's. Also the work itself looks period accurate and well done.
If you know of somewhere I could go to find a schematic or have a type 2 and are willing to take the wood off the front end and take a few pictures please let me know.