Microsoft Japan is seemed to be heavily promoting Windows Vista series of products in Japan. Two weeks ago, they launched Windows Vista Ultimate SP1, and now it’s the Windows Vista Home Premium upgrade edition. This upgrade edition will only offer 2,500 set, which will be included at no additional charge for existing Windows XP or Windows 2000 Professional to upgrade to Windows Vista Home Premium. It has a special Sakura CD box, for those who purchase this upgrade edition will also entitle to a one-year Windows Live OneCare and a special designed Windows Vista user manual.