Yoshiaki Shiraishi, who came up with the idea of the conveyor belt sushi bar after witnessing beer bottles on a conveyor belt at a brewery, launched his first restaurant In 1958, he launched this restaurant in Osaka, using a conveyor belt to transport sushi dishes to diners. This is when Sushi became a traditional Japanese dish.
Traditionally, nigiri sushi is served in pairs. Nobody knows why, but there are two theories: one is that nigiri sushi used to be considerably larger, similar to an onigiri rice ball, but that it was divided in half for speedy eating at street vendors. Another hypothesis is that Japanese sushi chefs and diners like symmetry in pairs because it is more aesthetically pleasing.
The poison tetrodotoxin is found in Fugu, a Japanese pufferfish. To remove the potentially lethal organs, Fugu chefs must be certified. Despite the dangers, Japan consumes roughly 10,000 tons of fugu each year as a winter delicacy. Certain dishes have become traditional over the years, these tend to be them popular dishes you all get together to eat as a family. Traditional Japanese food will always be served as a treat rather than a typical dish.