I have English(US) as my locale on my computer. I have this program which fails to run if locale is anything but Japanese. So only solution I thought I had was switching locale of the system. But that is inconvenient. After a little search, I found Applocale utility.
http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=13209
But it wont install on Windows 7 as is. You need to start the installation from elevated command prompt.
http://www.emreakkas.com/windows-tips/how-to-install-applocale-on-windows-7