The Japanese restaurant chain serving gyōza and other Japanese Chinese cuisine under the Ohsho brand is Gyoza no Ohsho.
Gyoza no Ohsho, also known as Ohsho Food Service, is a major Japanese chain specializing in gyōza alongside ramen, fried rice, karaage, and other chūka ryōri dishes. Its first restaurant opened in Kyoto in 1967, and the chain expanded through a mixture of company-operated and franchised restaurants.
The name means roughly “King of Gyoza,” with Ōshō written 王将. It is easy to confuse the chain with Sukiya or Yoshinoya, but those brands are primarily associated with beef bowls and fast Japanese dining. MOS Burger belongs to a different category altogether: Japanese hamburger restaurants.
Ohsho restaurants typically use a standardized grand menu, while individual locations may also offer regional set meals. Although the brand is Japanese, its menu belongs to Japan’s adapted Chinese-food tradition rather than to a purely traditional Japanese cuisine category.