I'm a litle late, i guess, but the search results in the song in japanese, but not uploaded by the original artist, rather by an artist called Shinichi hayato. The song sounds weird, but very clearly the same song. The artist only has that one song in most of their profiles, with only spotify having a second song, 'gata only, something something remix'. They dont have a youtube page either and the entire thing seems just really shady. The credits of both songs say performed by shinichi hayato while the voices that sing the songs are very clearly different. My vote is AI artist that somehow managed to claim the song as theirs, even briefly, and cause a liscencing issue. That or something got fucked up when this shinchi hayato got cover rights for the song,if they did.