Tateyama Historical Park (Iwayado Castle Honmaru Ruins)

This is the site of the castle of a powerful family that ruled this area from ancient times. It is said to have been the site of a fortress built by Fujiwara no Tsuneakiyo and his son Kiyohira in the late Heian period. An octagonal hall building and Niseiin Temple (where Buddhist statues are preserved) were erected to commemorate the great deeds of the father and son, Tsuneakiyo and Kiyohira. Visitors can enjoy the seasonal scenery of cherry blossoms, hydrangeas, and maple trees.


Niseiin Temple is usually closed. It is opened twice a year (May and August).