In Japan, we have a custom of wrapping food with leaves such as oak
for preservation from ancient times.
It is said that bamboo leaves (sasa) have been used from the period of “Narezushi (picked fish)”,
the origin of Edomae-zushi.
By placing bamboo leaves under sushi for pasteurization,
people tried to prevent sushi from rotting.
It has also the other important role.
Born in the late Edo period,Edomae nigari-zushi was commonly sold
at street stalls like today’s fast food shops.
After that, sushi restaurants emerged and they started sushi delivery.
Some restaurant arranged sasagiri put into delivery sushi depending on the customer’s family crest,
because relationship between sushi restaurant and their customers were said to be so strong at that time.
Thus, sasagiri garnished with sushi was getting popular and its techniques were being developed.