The Okusha is the tomb of Ieyasu Tokugawa. There are Dou Torii (Copper Torii Gate), Doujinko (Copper Warehouse), Haiden (Oratory), Inukimon Gate and Houtou (Treasure Tower) around the Okusha. Stone stairs begins from the Sakashitamon Gate, and each step has been made of single material. Also, the material had to be big and heavy enough in order to tolerate with ice needles in the severe winter.

You will find the Doujinko on the right after you passed through the approach and bronze Torii gate. The Doujinko also is called Houzou (Treasure Warehouse). The Swords, the armor, and the official documents, which were related to Ieyasu, were stored there in Edo period.