noun
Historical term for overnight duty at an imperial court, government office, or similar institution. Not used for modern night shifts.
平安時代、役人は宿直として夜間宮中に詰めた。
In the Heian period, officials stayed overnight at the imperial palace on night duty.
noun
attending a noble through the night
Historical term for staying up all night to attend a noble person. Rare and limited to pre-modern contexts.
宿直として、夜通し主君のそばに仕えた。
As a night attendant, he served his lord all night long.