‘Sushi day’ is not well-known to Japanese. I knew it just today from TV. But it seems to have a long history. This day was set in 1961 by the Japanese sushi union in hopes that sushi would become more popular. As November is the harvest season of rice, they chose today as the sushi day. I guess then the union must not have expected that it would catch on even overseas in 50 years. Actually, sushi was not so popular then in Japan as it is now.
Do you know that the popularity of sushi was closely related to the development of technology? Fresh seafood necessary for sushi is available only after the development of the refrigeration system. In Japan a fridge began to spread in the late 1950s.
Now sushi is enjoyed all around the world. On the other hand, thanks to the popularity, tuna and other marine resources continue decreasing. It is a serious problem to solve.
Anyway, I bought a small box of sushi in a supermarket to celebrate this day.