I'm quite sure it's Mojibake but I still miss what encoding I'm supposed to use. I bruteforced all I found to see if encoding/decoding produced something that I could read but nothing came out.
I was quite sure it was cp932 the orignal encoding because a lot of characters are present only in that encoding but doesn't seem like it is? (https://www.compart.com/en/unicode/charsets/containing/U+6756)