This rifle is actually an old bench rest rifle which used to win matches in it's day. It was built by the 17 cal guru Dick Saunders (it was his big bore rifle at 6mm!). He made a trigger similar to a Rem to fit and not much of the Japanese military is left and I believe he told me the wood was from Japan. I've had it for close to 40 years and shot it a little but never could reproduce the groups I got with his ammo that I got with it. Caliber is a short Wasp like rimmed cartridge in 6mm.
Dan