Burger King Japan unleashes new extra spicy “Big Mouth Inferno” burgers
Burger King has announced two new, limited-time additions to its popular “Big Mouth” series of large-format burgers.
The two new burgers are the “Double Beef Big Mouth Inferno Burger” and the “Chicken & Beef Big Mouth Inferno Burger.”
The “Big Mouth” series is a popular line of burgers in Japan, known for its focus on the chain’s signature flame-grilled, 100% beef patties and its substantial size.
Burger King Japan also recently released another giant-sized burger, the “Baby Body Burger”, which was a collaboration with the Japan Sumo Association.
This new “Big Mouth Inferno” series introduces a spicy kick to the lineup with the use of “Smoked Spicy Garlic Flakes.”
The two new burgers offer a smoky, savory, and spicy flavor profile.
Let’s take a closer look at both burgers!
- Double Beef Big Mouth Inferno Burger
- Price: ¥1,490 (single) / ¥1,790 (set)
This burger features two flame-grilled beef patties, four slices of smoky bacon, and four slices of cheddar cheese.
It is topped with the new smoked spicy garlic flakes and a special spicy sauce that includes chili pepper, garlic, and doubanjiang.
- Chicken & Beef Big Mouth Inferno Burger
- Price: ¥1,290 (single) / ¥1,590 (set)
This burger combines a flame-grilled beef patty with a new, hickory-smoked chicken patty.
It is topped with Bull’s-Eye BBQ sauce, a creamy cheese sauce, and the new smoked spicy garlic flakes.
Both new burgers are designed to appeal to fans of the existing “Big Mouth” series and those who enjoy a spicy flavor.
The new, limited-time burgers are scheduled to be released at Burger King locations across Japan from Friday, the 22nd of August, 2025.
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