That is just extraction encoding, you also need to launch the game with Japanese encoding.(for winrar, but its probably the same with 7zip)
download -> open the .zip archive -> go to options -> look for name encoding (or ctrl+E, I think)-> change it to 932-japanese -> unpack it somewhere
Click the Japanese Encoding hotlink in the OP's Installation tab.
Read "System Locale For Non-Unicode Programs" (Windows 11 works the same as Windows 10)