Motohiro's diary was called "Motohiro koki" or "Oenmanin Kanpaku ki," which showed his extensive knowledge of the ancient practices here and there, as he recorded his editing of intellectual papers, the study of Emakimono picture scrolls and ancient paintings, and the recreation of methods to produce kimono and everyday goods.
基熙の日記は『基熙公記』あるいは『応円満院関白記』といい、有識書類の校合整理、古画や絵巻物類の考証、装束・調度の製作技術の復活など、基熙の有職故実における該博な薀蓄を散見できる。