Manju containing koshian (sweet and smooth bean paste) is fried into tempura and then deliciously eaten as you enjoy the crunchiness of the coating. In Nagano, this delicacy is served during the O-Bon holidays so it is a culinary sign of summer. *O-Bon refers to the Japanese tradition of praying for one’s ancestors. Generally, it takes places over 4 days from August 13-16. See more details