For something to ponder, remember that there were Training rifles, /drill rifles / parade rifles / and service rifles in numerous types and forms used by many nations through WWII, and some nations still do.
Also, in the case of the Japanese, there are "last ditch" rifles (rifles identified as "last ditch" due to their generally inferior construction compared to service rifles.) This is a term made up by gun dealers, and may not be accurate.
The Japanese planned to use everything they had in their "last ditch" defense, and that included weapons built cheaply and poorly for the defense, service weapons and drill/training weapons, if they could shoot (once, anyway) and would take a bayonet. I've also heard they were producing large numbers of bamboo spears, and that there was one arsenal that kept producing type 38s (6.5mm) service rifles until the last days of the war.
Arisakas can be lots of different things, from a historical use perspective. I'm not an expert in the field, but I do know a few things, one of which applies to all wartime guns, buy the gun, not the story, without documentation.
Good luck with yours, its a wall hanger, not a safe functional firearm.