Did you know that January 22 is Curry Day in Japan? Curry has been transmitted to Japan through Europe from India. It is so popular that it is said to be a national food of Japan, and the Japanese like it so much that they eat curry and rice more than once a week. Because the meat and vegetable ingredients melt into the curry, the overnight curry is said to become more delicious. 50% of Japanese eat curry udon from leftover curry.