DONT shoot it -- im not saying its un-safe to do, but what caliber is it??? the japenese made those rifles in at least 2 different calibers( 6.5 and 7.7), maybe more or some variations in those calibers. they also made those guns in trainer models.
those guns have a lot of collector value, but i dont know anyone that shoots'em.
go watch the "tales of the gun" japenese weapons episode and they will go over the ammo differences.
the hardest arisakas to find are the first ones with -- flip down aircraft sights, bipod, metal butt plate, and a intact mum. then they start to vary which is what most will find, until you get to "last ditch effort" guns. which have wood butt plate, crud sights, no bipod, and the back of the bolt un-machined.
really find someone who knows those guns and can tell you everything you need to know, and if its safe to shoot.