Studying "Osashizu-Goyo-ki" the followings were revealed. 1. The fundamental plan of reconstructing the main buildings of the Imperial Palace was laid down by Okajima-Kozuke-Jo who worked from April to December in the 8th year of the Tenmei era (1788) as one of the chief carpenters of Nakai-Yakusho. 2. He gave a technical support to the reconstruction works. 3. He assumed the responsibility for explaining to the nobles and officials of the Imperial Court the basic idea of his plan.
