I’ve just updated the instructions and added images. This is how you can change the language in any Steam game that supports multiple languages.
Viewing post in Wataju - English Fan Patch comments
I don't think you understood me... When I say JP version I mean the Japanese language option of the Steam release!!! If you don't understand my explanation, look up how to change the language of ANY Steam game online. And if that doesn't work, then just refund it. It won't work with the Freem version, it was made ages ago with a different engine.