Naishiden was once a building for the “naishi” court ladies who served in the shrine. It is also called “Utsushidono”, because deities of the main shrine and Wakamiya Shrine are moved (“utsushi”) to this place at the time of “Zotai” (rebuilding) that takes place every 20 years. The building faces east, and the west part called Hisashi Room is used as the temporary dwelling place for the deity of Wakamiya Shrine.