That is a a post 1939 -1945 series 24 Kokura. They made only series 20 to 25. That rifle was most likely cut down for hunting. Since the mum remains intact and the bolt matches?? I bet a USMC ground pounder brought this back for hunting or as a war souvenir. Back in the 1940s the boys had little cash and most hunted as a past time. Since most could not buy a new rifle at a Sears or hardware store they utilized the rifle they brought back. Some had the wood cut, barrels cut down, bolts bent, and rechambered the rifles for use of cheep hunting ammunition instead of the 7.7 jap. A Depression era "make do with what you have attitude". Modifications made for a lighter rifle in the brush.
Now if everything matches and it's a family bring back, it would be a labor of love to restore it. A costly effort. But be sure the bolt matches and the barrel has not been cut or rechambered. Otherwise, it's a parts rifle worth $75 . Now to find a complete intact stock and hand guard with an original finish is a real hunt and about $200-300. An original cleaning rod $75. other small parts ??? It's not worth the effort to restore such a dog unless the metal remains intact- no rechamber and bolt matches. If it is a family gun from a WW II Vet you know, then the best bet is buy a second intact type 99 Kokura with all its parts and its stock remains intact and not refinished. However, this second rifle is a miss match with a poor bore or rechambered bore so you can get it cheep say around $200. Use the donor rifle for the stock and missing metal and drop your intact action into the second stock.
Most stocks were refinished and are incorrect, so you need a stock with cartouches, an intact finish, and the correct maker--Kokura. Big bucks.
hence you search out a second Mum-Less, mismatch with a good stock and cleaning rod. Gun shows or sometimes eBay. Most have the metal, but watch out for reproductions. Stocks are a hard find and in great demand since so many were sanded and refinished which destroys it value.
One source of parts is libertytreecollectors, at least you can see prices. Parts be crazy.
https://www.libertytreecollectors.com/p ... ategory=83
By the way, the condition of the blue and metal on that rifle looks almost brand new, excellent condition like it was hardly used, so that is why there is little evidence of rust or blue wear on the barrel. I also bet the inside of the bore is like new, with bright rifling. Too bad the stock was chopped and a varnish or shellac slopped over the wood. Bolt is also showing little wear. Find a beater Kokura, with a bad bore, no mum (ground), and miss matched bolt or missing bolt for say $200, that has a used, but intact stock & hand guard that matches with an original cleaning rod and switch them out. Poof! you got a nice Arasaka. Add an original sling for another $200-300, and you got a really nice rifle.
The problem is it will take some time to find the right donor rifle, not sure how many Arisakas are at AZ gun shows??? In WI, you see dog Arasakas at most shows. Most are missing the cleaning rod or were refinished.