You can quickly look up Japanese poastal codes (postal codes). Also you can see the map where you are looking up.
Using the official recently data come from Japan Post Service Co., Ltd.
You can look up with a poastal code.
You can look up with an address.
You can look up with Hiragana if you put only Hiragana letters.
This site allow you to look up with alphabet as Romaji.
Note that you can not drop U and O (e.g., toUkyou, kyoUto, hokkaidoU or oOsaka).
If you want to look at the place on the map where you are looking up, click the link at addresses on the result list.