Burger King Japan Launches the Autumn Special Mushroom Whopper on Oct 23 with Original Herb Sauce, Plus ¥300 Off Sets
Burger King Japan’s Autumn Special Mushroom Whopper arrives October 23, 2026. It pairs four kinds of roasted mushrooms and flame-grilled beef with a new, spicy Original Herb Sauce made with oregano and thyme, and comes in regular, Double, and Jr. sizes starting at ¥590 à la carte. Through October 29, regular and Double Mushroom Whopper sets are ¥300 off in store, so fries and a drink effectively come free. A New Autumn Edition of Burger King’s Popular Series BK Japan Co., Ltd. (headquartered in Chiyoda, Tokyo), which operates Burger King in Japan, will release three limited-time items in the new Autumn Special Mushroom Whopper lineup starting Friday, October 23, 2026. The Mushroom Whopper has become one of Burger King’s go-to limited-time series, and the star of this new edition is the Original Herb Sauce, a new-style sauce that pairs the fresh notes of oregano and thyme with a…



























