Burger King has launched its new Autumn Special Mushroom Whopper range in Japan, available from October 23, 2026. The lineup includes three burgers made with flame-grilled 100% beef patties, four types of mushrooms, and a new herb sauce.
The burgers are available at participating Burger King restaurants nationwide, while a one-week in-store discount runs from October 23 through October 29. The campaign covers six mushroom burger sets, with discounts of up to ¥300 (tax included).
The Autumn Special Mushroom Whopper costs ¥990 on its own or ¥1,290 as a set. The Double version costs ¥1,440 or ¥1,740 as a set, while the Jr. version costs ¥590 or ¥890 as a set. Discounted campaign set prices start at ¥790.
- About the Autumn Special Mushroom Whopper
- Autumn Special Mushroom Whopper
- Autumn Special Double Mushroom Whopper
- Autumn Special Mushroom Whopper Jr.
- Mushroom Whopper
- Double Mushroom Whopper
- Mushroom Whopper Jr.
- Autumn Special Mushroom Whopper Set Discount
- Autumn Special Double Mushroom Whopper Set Discount
- Autumn Special Mushroom Whopper Jr. Set Discount
- Mushroom Whopper Set Discount
- Double Mushroom Whopper Set Discount
- Mushroom Whopper Jr. Set Discount
- Highlights
- Menu and Campaign Details
About the Autumn Special Mushroom Whopper
Autumn Special Mushroom Whopper
The standard Autumn Special Mushroom Whopper combines a flame-grilled beef patty with four mushroom varieties, fresh vegetables, herb sauce, and creamy mayonnaise sauce. It costs ¥990 alone or ¥1,290 as a set, tax included.
Autumn Special Double Mushroom Whopper
The double version adds a second flame-grilled beef patty to the mushroom burger. It is priced at ¥1,440 alone or ¥1,740 as a set, tax included.
Autumn Special Mushroom Whopper Jr.
The Jr. size offers the autumn mushroom burger in a smaller format. It costs ¥590 alone or ¥890 as a set, tax included.
Mushroom Whopper
The regular Mushroom Whopper remains available with four mushroom varieties, fresh vegetables, and a pepper mayonnaise sauce. Prices are ¥990 alone and ¥1,290 as a set, tax included.
Double Mushroom Whopper
The Double Mushroom Whopper features two flame-grilled beef patties with the mushroom topping. It costs ¥1,440 alone or ¥1,740 as a set, tax included.
Mushroom Whopper Jr.
The Mushroom Whopper Jr. is the smaller version of the regular mushroom burger. It costs ¥590 alone or ¥890 as a set, tax included.
Autumn Special Mushroom Whopper Set Discount
The Autumn Special Mushroom Whopper set drops from ¥1,290 to ¥990 during the campaign, a ¥300 discount.
Autumn Special Double Mushroom Whopper Set Discount
The Autumn Special Double Mushroom Whopper set drops from ¥1,740 to ¥1,440, saving ¥300 during the one-week in-store campaign.
Autumn Special Mushroom Whopper Jr. Set Discount
The Autumn Special Mushroom Whopper Jr. set drops from ¥890 to ¥790, a ¥100 discount.
Mushroom Whopper Set Discount
The Mushroom Whopper set is reduced from ¥1,290 to ¥990 during the campaign, saving ¥300.
Double Mushroom Whopper Set Discount
The Double Mushroom Whopper set is reduced from ¥1,740 to ¥1,440, a ¥300 saving during the in-store promotion.
Mushroom Whopper Jr. Set Discount
The Mushroom Whopper Jr. set drops from ¥890 to ¥790, giving customers a ¥100 discount.
The standard Autumn Special burger combines roasted mushrooms, king oyster mushroom, and shimeji mushroom with lettuce, tomato, and onion. An original herb sauce brings fresh oregano and thyme notes with a spicy finish, while creamy mayonnaise sauce adds richness. The double burger uses two flame-grilled beef patties, and the Jr. version offers a smaller serving.
Highlights
- Three new burgers use four mushroom varieties and flame-grilled 100% beef patties.
- The Autumn Special Mushroom Whopper is ¥990 alone or ¥1,290 as a set, tax included.
- The Autumn Special Double Mushroom Whopper is ¥1,440 alone or ¥1,740 as a set.
- The Autumn Special Mushroom Whopper Jr. is ¥590 alone or ¥890 as a set.
- Sets include small French fries and a medium drink.
- During the campaign, eligible sets are discounted by ¥300 or ¥100, depending on the product.
Menu and Campaign Details
| Item | Details |
|---|---|
| Name | Burger King Autumn Special Mushroom Whopper range and Mushroom Whopper campaign |
| Menu / items | Autumn Special Mushroom Whopper; Autumn Special Double Mushroom Whopper; Autumn Special Mushroom Whopper Jr.; Mushroom Whopper; Double Mushroom Whopper; Mushroom Whopper Jr.; corresponding sets with small French fries and a medium drink |
| Release date | October 23, 2026 |
| Period | October 23, 2026 – October 29, 2026 for the in-store discount campaign; the new burgers are available from October 23, 2026 for a limited period |
| Location | Participating Burger King restaurants in Japan |
| Stores | Burger King restaurants nationwide; campaign available in stores, at staffed registers, self-ordering kiosks, and through mobile ordering. Not available for delivery. |
| Price | Autumn Special Mushroom Whopper: ¥990 alone, ¥1,290 as a set; Autumn Special Double Mushroom Whopper: ¥1,440 alone, ¥1,740 as a set; Autumn Special Mushroom Whopper Jr.: ¥590 alone, ¥890 as a set; Mushroom Whopper: ¥990 alone, ¥1,290 as a set; Double Mushroom Whopper: ¥1,440 alone, ¥1,740 as a set; Mushroom Whopper Jr.: ¥590 alone, ¥890 as a set; campaign prices: Autumn Special Mushroom Whopper set ¥990, Autumn Special Double Mushroom Whopper set ¥1,440, Autumn Special Mushroom Whopper Jr. set ¥790, Mushroom Whopper set ¥990, Double Mushroom Whopper set ¥1,440, Mushroom Whopper Jr. set ¥790 (all tax included) |
| Official website | Burger King Japan official website |
Before you buy
- When can I buy the Autumn Special Mushroom Whopper?
- The new burgers go on sale from October 23, 2026 at participating Burger King restaurants in Japan. Morning-service locations begin selling them after 10:30 a.m.
- How much is the Autumn Special Mushroom Whopper set?
- The regular set price is ¥1,290 (tax included). From October 23 through October 29, the campaign price is ¥990 (tax included).
- Where can I use the mushroom burger set discount?
- The discount is available in participating restaurants for dine-in or takeaway, with a limit of three sets per transaction. It cannot be combined with other discounts or used for delivery.
