Oshiro Gofu (御城碁譜) Castle Games Records
The Castle Games 御城碁 (oshirogo) were played in the Shogun's castle during the Edo period from 1626 - 1863. It was an official match played by representatives of the four go houses (Hon'inbo, Hayashi, Inoue, and Yasui) in the castle of the shogun.
The Castle Games Records, in 10 traditionally bound volumes, was edited in 1950-1951 by Segoe Kensaku (瀬越憲作). First published by 御城碁譜整理配布委員会 (Oshiro Gofu Seiri Haifu Iinkai) in 1951 (昭和26) and later by 誠文堂新光社 (Seibundo Shinkosha) in 1978 (昭和53).