historical buildings

If you are a history fan, definitely visit the historic buildings of Japan. Castles in the Kansai area like Himeji Castle and Osaka Castle are always a good idea. Temples and Shrines are also good if you are interested in Japanese religion. Itsukushima Shrine in Hiroshima is built in the ocean and is a unique sight. Even just walking around an old town like Kyoto would be nice.