I don’t use sjsunzip. 7zip works fine if you set your system locale to Japan.
If you have 7zip installed and don’t wanna change your locale there is another way. It’s the way I usually extract Japanese rpgm zips.
Open the folder you downloaded ff5 to. Then left click an empty part of the window so that no files are selected. Then hold shift and right click, again in an empty part of the window. If you did it right you’ll see an option powershell window here.
If it doesn’t work for you. You can also open powershell normally and cd to the folder. If you know how to do that.
Type in . "C:\Program Files\7-Zip\7z.exe" -mcp=932 x "FF Ver5.0.zip"
Don’t forget the period at the beginning or the quotes
The first part might be different if you installed 7zip to a different folder. You’ll have to find where 7z.exe is and use that path instead.
This tells 7zip that it’s a Japanese zip so it knows how to extract the file names
The same thing works for any Japanese zip .All you do is replace the last part with the name of your zip file.
The same command works in command prompt. Just get rid of the period at the start.