Because it's a registered trademark of Fuku-zushi. Marinated Spanish mackerel is soft but has a comfortable toughness. Having your mouth full with hot rice and Spanish mackerel, it'll be addicted. Sesame, myoga (Japanese ginger) and ginger add the the well-balanced refreshing seasonings to the sweet soy-marinated Spanish mackerel.
2-16-17 Houkan-cho Kita-ku, okayama-shi, okayama