Two observations for your consideration:
The Japanese manufacture some high-quality firearms they may not own in Japan.
We have a large Japanese-owned manufacturing complex near us (Lexington,KY.) As a result, we have many Japanese nationals here on "temporary" assignment (rotation.) While here, a surprising number buy handguns (somehow) and spend a fair amount of time at local ranges shooting. They thoroughly enjoy themselves!
I'm wondering how long it will be until the gun ownership laws in Japan are relaxed for folks like we see so often.