SonicStage English Patch was developed so that you can finally use the SonicStage Japanese program.
Just download the installer “SonicStage Installer” and install it. You will now have SonicStage in Japanese.
Then download the “SonicStage English Patch v2.0″ and install it.
Make sure you choose your SonicStage Directory when you run the patch. Default directory should work but if you changed it be sure to select it.