Normally, products with tastes suitable for each region are shipped separately to western Japan and eastern Japan, but during the period, each product with a large "East-West Eating Comparison Mark" on the package is sold nationwide, and the taste You can enjoy the difference.
The characteristics of the soup stock of "Kitsune Udon" and "Tempura Soba" are the dark color with "Katsuo Dashi" in the East Japan specification and the light color with "Konbu Dashi" in the West Japan specification. "Curry udon" is characterized by a dark soup with a "rich richness" in the eastern Japan specification and a light soup with a "dashi umami" in the western Japan specification.