References
Matsuya foods.(n.d.).Matsuya fuzu no kiseki[Miracle of Matsuya foods].Retrieved December 22, 2018 from Matsuya Official Web site:https://www.matsuyafoods.co.jp/recruit/new/concept/index.html
Shibukawa,Y.(2012,May 11).Meiji jidai kara shomin no mikata datta Gyudon[Beef bowl that had been on the people's side since the Meiji period].Retrieved December 22, 2018 from Japan Business PRESS Web site: jbpress.ismedia.jp/articles/-/35173?page=4
Sukiya.(n.d.).Yokuaru goshitsumon[Frequently asked questions].Retrieved December 22, 2018 from Sukiya Official Web site: https://www.sukiya.jp/about/
Yoshinoya.(n.d.).Gyudon hyakunen sutori[Beef bowl 100 years story].Retrieved December 22, 2018 from Yoshinoya Official Web site: https://www.yoshinoya.com/kodawari/story/