He was versed in the study of Japanese classical literature, and he participated with Ito in drafting the Constitution of the Empire of Japan, the Imperial House Act, the Imperial Rescript on Education and the Imperial Rescript to Soldiers and Sailors.
国学等にも通じ、伊藤とともに大日本帝国憲法や皇室典範、教育勅語、軍人勅諭などの起草に参加した。