Nikkei newspaper estimated the 2015 market share of gyudon restaurants in Japan. According to it, Sukiya occupied a half of the market share.
The total sales of 2015 were 362 billion yen. It increased by 3.9% from 2014.
Figure: Gyudon (Beef Bowl) Restaurant Market Share in Japan, 2015
|Restaurant||Market share (%)|
Source is Nikkei Sangyo Shimbun newspaper, the article on 2016 July 25th.