In the late Tenpo era (1830 - 1844), a kind of sushi was peddled in Edo (old Tokyo), aburaage opened from one side into the shape of a bag, and stuffed with rice mixed with minced mushrooms and kanpyo.
「天保（1830年～1844年）末年、江戸にて油揚げ豆腐の一方をさきて袋形にし、キノコかんぴょうを刻み交へたる飯を納て鮨として売巡る。」