When a street stall selling sushi named 'Ebisu-zushi' served sushi topping with tuna meat that was parboiled and immersed in soy sauce, the sushi became quite popular and the fish established itself as one of the major tane of Edomae-zushi.
「恵比寿鮨」なる屋台のすし屋が鮪を湯引きし、醤油に漬けてすしに漬けたところ、大いにヒットして、以降江戸前ずしを代表するタネになっていった。