Hey there! You can change your locale to Japanese with a few easy steps.
- Click Start, then Control Panel
- Click Clock, Language and Region
- Windows 10, Windows 8: Click Region
Windows 7: Click Region and Language
Windows XP: Click Regional and Language Options
The Region and Language options dialog appears.
- Click the Administrative tab
On Windows XP, click the Advanced tab
If there is no Advanced tab, then you are not logged in with administrative privileges.
- Under the Language for non-Unicode programs section, click Change system locale and select the desired language.
- Click OK
- Restart the computer to apply the change.
Changing your system locale does not change the language of the OS, so no need to worry about your computer being in Japanese.
After doing that, you'll need to redownload UTAU and any Japanese banks you may have downloaded previously. Extracting installers or folders downloaded before the locale change genwrally results in corrupted files.
And I would recommend changing the path of your Oremo to be shorter. Sometimes I have issues with long paths. I have mine set up as Documents > Oremo. Also make sure you are the admin of your computer, or have the admin password. Sometimes running as admin helps.