20th year of O-ei (1413) Guchu-reki (Jugo Mansai nikki) Title 20th of O-ei (1413) Guchu-reki (Jugo Mansai nikki) Physical data 1 scroll Creator -- Note On verso: Jugo Mansai nikki(the diary of Jugo Mansai) Date -- Subject(NDC) 499.81 210.46 Publisher -- Call No. WA1-1 Place --     This is a Guchu calendar made in the 20th year of O-ei (1413), on the back of which is a diary written by Jugo Mansai (1376-1435), the high priest of the Daigoji Temple, upon whom the emperor conferred the lofty rank of "Jusango." He was highly regarded and taken into the confidence of three Muromachi shoguns, Ashikaga Yoshimitsu, Ashikaga Yoshomichi and Ashikaga Yoshimasa, and known as the "Priest in Black." His diary is treasured as a historical record giving an insight into the political affairs of the era. With the spread of kana, Japan's phonetic alphabet, "Kana-goyomi," a simplified edition of Guchu-reki written in kana, appeared. In the middle of the 14th century calendars started to be printed and soon reached a broader range of users.