The 2008 update package for the Japanese postal code dictionary in the Japanese Input Method Editor is now available for Windows Vista and Windows Server 2008
This article describes an update package for the Japanese Input Method Editor (IME) in Windows Vista and Windows Server 2008. This package uses the postal code information that was released in September 2008 to update the Japanese postal code dictionary. The update information is based on data that is published by Japan Post and by the Ministry of Public Management in Japan.
You can use the IME postal dictionary to convert postal codes to addresses.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB960159.