Windows 7 Ultimate Language Option

I am looking to install Win7 Ultimate on a new computer I plan on buying for my wife. The computer is an English language unit with Win7 Home Premium factory installed. I plan on installing Win7 Ultimate so she may use the Japanese language capability of Ultimate. Will the OS run Japanese software? My lovely wife uses a computer like a car - i.e. turn on and go. Any glitch or issue and it's a crisis. I don't mind helping but her current OS (Xp) is all Japanese and I cannot navigate the screens and, well, hopefully you can understand THAT situation. I want to get her a fully functioning Japanese language computer but if there is a printer or some other error, have the ability to do the troubleshooting in English. Thoughts or Advice is appreciated. Thanks.

You can use either MUI or LIP.

MUI - Multilingual user interface is a complete translation of all areas(except some parts which need not or cannot be translated). You can install English edition of Windows 7, then install Japanese MUI. Then you can switch back and forth between languages from control panel.

LIP - Language Interface Pack - They are free to download and provide translation for selected areas of Windows.

http://windows.microsoft.com/en-US/windows7/How-do-I-get-additional-display-languages

Thank you for the pointer Romeo29. The big deal is running JA software.
I will look into these options and hopefully a solution. I'm a little skittish in light of trying to use Windows EZ transfer previously on a EN laptop and the JA programs corrupted in the process. A backup had been made so it wasn't a show stopper. Perhaps a clean install of the programs would work better. Just trying to keep from bleeding green ($). Thank you again. A.