In order to extract sap from a maple tree, it must be around 30 to 40 years old.
Depending on the diameter of the trunk, from one to three holes are drilled in it and taps are placed in them. The tree is used to obtain sap until it is over 100 years old.
Until 1923, sushi was primarily served as street food.
After the 1923 earthquake that struck Japan, owning a restaurant became more accessible due to a rapid drop in property prices, and such estates gained popularity.
