There is a record in "Shoku Nihongi" (Chronicle of Japan Continued) that court functions were canceled when Retired Emperor Shomu's mother, GUJIWARA no Miyako died (as a case of a mother's death) and Emperor Kanmu's father, Retired Emperor Konin died (as a case of a father's death).
記録上確認できるのは、『続日本紀』に記された聖武上皇の母藤原宮子の死去の時（母親の事例）と同じく桓武天皇の父光仁上皇の死去の時（父親の事例）に宮中行事が中止されたことが記されている。