Naikaku seido 70-nenshi, suppl. (Sōrichō Tōkeikyoku; est. 4/Shōwa 21 [1946]; changed to Sōrifu Tōkeikyoku 5/Showa 22 [1947])
LC manual auth. cd. (history cd. under hdg. of Japan. Sōrifu. Tōkeikyoku: Naikaku Tōkeikyoku is the name used during: 1885-1893, 1898-1920, 1924-1942, 1943-1947)