On March 17, Yoshinoya announced to start round-the clock gyudon sales for the first time in four years and a month because it was successful to expand the supply source of US beef, a main ingredient of the gyudon, and became capable of securing the quantity of beef required for regularly offering 24-hours serving at about 1040 outlets nationwide..
吉野家は牛丼の主原材料となる米国産牛肉の調達先開拓がすすみ、終日営業に必要な量の確保が可能となったことにより、全国の吉野家約1040店で牛丼の常時24時間販売を約4年1ヶ月ぶりに再開すると3月17日発表。