As Okura YAMANOUE, a poet in the Nara period left a poem including the term "kasuyuzake" (literally sakekasu soup sake) in his anthology "Hinkyu-mondoka", it can be considered that amazake was already made from sakekasu at that time.
なお、奈良時代の歌人である山上憶良が、『貧窮問答歌』において「糟湯酒」と書き記した歌を残しており、その頃から既に酒粕による甘酒の原型もあったことが窺える。