I'm not convinced they know much about Japan either. The akiya banks are notoriously not updated regularly, and the sites which sell them to foreigners even less so. I couldn't find that house in the bank but it appears to be now listed by an agent. Single storey, wooden, 50 years old, in a bit of a flood zone, not even a convenience store or supermarket within a mile's walk.

It's true Japan has a lot of empty houses, estimates are around 10%. Japan also has a culture of somewhat continuously demolishing / rebuilding houses, which is understandable in an earthquake prone area. That house isn't in the worst state for an akiya, but it clearly needs significant renovations, even before considering understandable earthquake anxiety and newer building standards (E g. steel frames) mean that houses like the one pictured aren't exactly top choices to begin with.

Also, the inheritance tax is a progressive tax, including a tax free threshold. 55% is the top tier and you need to be talking about literally millions of USD assessed value before that kicks in. Real estate is valued at less than fair market price for inheritance and gift tax purposes too. Even the most conservative internet article commenters in Japan will condemn people for avoiding their inheritance tax obligations.

Also no, you won't find wolves anymore in Japan, just fucking bears. The last year has been the worst in a while for bear attacks on humans, so I'm not sure the hypothetical deer population explosion is going to be a real concern. The robot wolves are scarecrows and were designed to look like wolves in the hopes of scaring off the bears, according to the link in the post itself.

The whole thing reads like fiction with grains of "fact" scattered throughout which hopes to avoid scrutiny by being a subject matter too dry and niche to be called out on.