The taste of boiled rice with the tare sauce seeped in it became so popular in the Shibai-cho area, and it is said that Onoya in Fukiya-cho as the origin started selling it under the catch phrase, "Ganso Unagi-meshi" (the originator of a dish of broiled eel on boiled rice).
この御飯にタレが染込んだ味はこの芝居町で大人気となり、葺屋町にある大野屋が「元祖鰻めし」という看板で売り出したのが最初だと言う。