Japanese convenience stores launch volume-increase food campaigns

Japanese convenience stores are conducting simultaneous volume-increase campaigns throughout late August 2026.

NewDays is hosting its ‘Volume Increase Festival’ through September 7. The first phase, running until August 31, features eight products with increased portions at no extra cost. Featured items include beef tongue-style rice balls, BLT sandwiches, and various sweets and breads. Customers using the NewDays app can also earn stamps to receive free beverage coupons.

Ministop is running its ‘Zukkyun Volume Increase Fair’ from August 18 for two weeks. The first week focuses on a limited selection of four items, including ham sandwiches with an extra layer, spicy mala fried rice with a 50% volume increase, and sushi sets with increased quantities of inari and thick rolls.