SUKIYA

Sukiya is the largest chain of gyūdon restaurant. Sukiya's owner, Zensho Holdings, is listed on the Tokyo Stock Exchange and had sales of ¥511 billion in 2016. Its slogan is "save time and money". According to the publicity printed in English on the walls of the restaurant, it originated in Yokohama, Kanagawa. Unlike Yoshinoya, Sukiya did not stop serving gyūdon during the ban on American beef imports, instead switching to beef imported from Australia.

In response to Yoshinoya's butadon, Sukiya began serving its own version, tondon. On September 11, 2013, a Sukiya restaurant was opened in Mexico City, being the first to be opened in Mexico. The Zona Rosa restaurant offers 24/7 service. On July 3, 2014, a Sukiya restaurant was soft opened in Taipei City, making it the first Sukiya in Taiwan. The restaurant only operates from 7 am to 11 pm, but is planned to provide 24/7 service by late 2014.

Source: Wikipedia