I think the gun laws in Japan would prohibit it, but if you like I know a few Japanese nationals in Japan and I can ask if there is a way to return the rifle. I'm big on history BUT, the reason I'm interested in the rifle is because my Grandfather and uncle fought in the pacific war. My
Grandfather landed on the Island of Tinian, Saipan, and Guam (SEABEES); One uncle (US Army) was on the Philippine Island of Cebu fighting as a Gurellia after the US forces were overrun. I had another uncle (US ARMY) fighting in the European campaigns.
I doubt that I could afford such a rifle in all honesty.