In this book, the head of the Odachi clan, who served the Muromachi bakufu as moshitsugishu (a civil servant post of Muromachi bakufu) and played a role of corresponding secretary between seii taishogun (literally, a great general who subdues the barbarians) and influential families, listed actual shosatsurei together with his notes based on the categories of addressees, namely shogun, court nobles including top court officials, Buddhist priest including monzeki (priest-prince), shugo-daimyo (military governor) including kanrei (shogunal deputy), officials of Muromachi bakufu and vassals of daimyo.
室町幕府申次衆などを務め、征夷大将軍と諸権門との連絡役を務めることが多かった大舘氏当主が将軍・公卿以下の公家、門跡以下の僧侶、管領以下の守護大名、室町幕府の諸役人や諸大名の家臣などに出す場合の書札礼を差出対象ごとに分けた上で実際の書札を例に取りながら注記を加えたものである。