Unfortunately this has been discussed many times and is becoming a long-term problem, not just in Japan but basically everywhere else outside of Taiwan I guess…
There are many posts and players complaining from Europe, Australia, and probably more since it’s been getting worse, too…
Nothing has been done and not so much of a useful response was given either…
Maybe posting there in the new Chinese forum so that the complaint can reach the cheaters easier and make them feel guilty…? (which I highly doubt of course cause they’re just shameless)
Literally just saw a post on Threads(they’ve deleted it… sadly) the other day thanking and praising spoofing app developers. And the first place they decided to spoof to is Japan to gather the Shrine&Temple decor Pikmins and “good-looking” postcards…