Burger King's Popular "Big Mouth" Series Welcomes New "Dirty" Burgers Featuring Punchy "Special Garlic Mayo Sauce"! Introducing Two New Large Burgers: "Double Beef & Hash" and "Beef & Chicken"!

BK Japan Inc. (Headquarters: Chiyoda-ku, Tokyo, President & CEO: Kazuhiro Nomura) will launch two new limited-time products from its highly popular "Big Mouth" series on July 3, 2026 (Fri). These are the "Double Beef & Hash Big Mouth Dirty" and "Beef & Chicken Big Mouth Dirty," which feature flame-grilled 100% beef patties, rich cheese, and an overflowing "Special Garlic Mayo Sauce" with a punchy flavor.

From the highly popular "Big Mouth" series, known for the deliciousness of Burger King's® flame-grilled patties that exude the savory flavor of meat seared by fire, come two new products: the "Double Beef & Hash Big Mouth Dirty" and "Beef & Chicken Big Mouth Dirty." These burgers are layered with rich cheese and an overflowing "Special Garlic Mayo Sauce" with a punchy flavor.

The newly developed "Special Garlic Mayo Sauce" is a tantalizing sauce with the punchy flavor of garlic paste and garlic powder, accented by the sharp taste of black pepper. The "Big Mouth Dirty" is finished with the sauce applied twice, both above and below the ingredients, allowing you to savor the overflowing sauce with every bite.

The "Double Beef & Hash Big Mouth Dirty" features two flame-grilled 100% beef patties, a crispy and fluffy hash brown, two slices of cheddar cheese, and accent pickles. Furthermore, it's a voluminous double beef burger overflowing with the "Special Garlic Mayo Sauce," which combines creamy mayonnaise with the appetite-stimulating punchy flavor of garlic paste and garlic powder.

The "Beef & Chicken Big Mouth Dirty" combines a flame-grilled 100% beef patty with a crispy on the outside, juicy on the inside chicken patty, two slices of cheddar cheese, an authentic chili bean sauce made with minced meat and spices like chili powder and cumin, fresh onions, and accent pickles. It's a large, authentic burger generously packed with beef and chicken, overflowing with the "Special Garlic Mayo Sauce" that combines creamy mayonnaise with a punchy, appetite-stimulating flavor.

Fans of the "Big Mouth" series and those who love satisfyingly large burgers, please enjoy the "Double Beef & Hash Big Mouth Dirty" and "Beef & Chicken Big Mouth Dirty" with their overflowing "Special Garlic Mayo Sauce" and punchy flavor, by taking a big bite!

Product Details

Product Name: Double Beef & Hash Big Mouth Dirty

Release Date: July 3, 2026 (Fri) onwards

Price: Single item \1,490, Set \1,790

Product Name: Beef & Chicken Big Mouth Dirty

Release Date: July 3, 2026 (Fri) onwards

Price: Single item \1,490, Set \1,790

<Notes>

*The set includes French fries (S) and a drink (M).

*Available from 10:30 AM at stores offering breakfast.

*Not available at some stores.

*Sales hours may vary by store.

*Sales may be temporarily suspended due to store conditions.

*All prices include tax.

*Product design and prices are subject to change without notice.

*Images are for illustrative purposes only.

*The following stores do not sell "Double Beef & Hash Big Mouth Dirty" and "Beef & Chicken Big Mouth Dirty." Please be aware of this in advance.

Burger King® Tokyo Racecourse Store (Tokyo Racecourse, Fuchu City, Tokyo, Hiyoshicho 1-1, Fuji View Stand 2F Food Court)

Burger King® Kyoto Racecourse Store (Kyoto Racecourse, Fushimi Ward, Kyoto City, Kyoto, Yoshijima-watashiba-cho 32, Kyoto Racecourse 1F Food Court)

Burger King® Kansai International Airport Terminal 1 Store (Kansai International Airport, Rinku Port North 1, Izumisano City, Osaka, Terminal 1 Building Main Building 2F International Departure Area)

Burger King®'s popular "King Fusion" sundae series welcomes a new dessert that satisfies chocolate cravings! Introducing the new "Chocolate & Brownie Sundae" featuring soft serve ice cream, chocolate sauce, and crunchy, rich brownie!

Starting July 3, 2026 (Fri), Burger King® will launch the limited-time "King Fusion Chocolate & Brownie Sundae" from its popular "King Fusion" sundae series. This dessert combines smooth soft serve ice cream with a luscious chocolate sauce and is topped with a crunchy, rich chocolate brownie.

The "King Fusion Chocolate & Brownie Sundae" is a limited-time, luxurious sundae that pairs mellow soft serve ice cream with a smooth chocolate sauce and is topped with a crunchy, rich chocolate brownie with a spreading cacao flavor. It's an irresistible dessert for chocolate lovers, offering the enjoyment of cold soft serve, melting chocolate sauce, and the crunchy texture of rich chocolate brownie with every spoonful.

Chocolate lovers, or anyone looking for a slightly special dessert, can enjoy the "King Fusion Chocolate & Brownie Sundae" to satisfy their chocolate cravings, whether on its own or with their favorite burger. Burger King® will continue to develop the "King Fusion" sundae series. Please look forward to future announcements.

Product Details

Product Name: King Fusion Chocolate & Brownie Sundae

Release Date: July 3, 2026 (Fri) onwards

Price: \490

<Notes>

*This is a limited quantity product and will be discontinued once sold out.

*Not available at some stores.

*Not available for delivery.

*All prices include tax.

*Sales hours may vary by store.

*Sales may be temporarily suspended due to store conditions.

*Product design and prices are subject to change without notice due to campaign changes.

*There may be times when sales are unavailable due to equipment maintenance.

*Images are for illustrative purposes only.

*The following stores do not sell "King Fusion Chocolate & Brownie Sundae." Please be aware of this in advance.

Burger King® Tokyo Racecourse Store (Tokyo Racecourse, Fuchu City, Tokyo, Hiyoshicho 1-1, Fuji View Stand 2F Food Court)

Burger King® Kyoto Racecourse Store (Kyoto Racecourse, Fushimi Ward, Kyoto City, Kyoto, Yoshijima-watashiba-cho 32, Kyoto Racecourse 1F Food Court)

Burger King® Kansai International Airport Terminal 1 Store (Kansai International Airport, Rinku Port North 1, Izumisano City, Osaka, Terminal 1 Building Main Building 2F International Departure Area)

About the Burger King® Brand

Established in 1954, the Burger King® brand is the world's second-largest quick-service hamburger chain by number of restaurants, operating in over 19,000 locations in more than 120 countries and territories across the United States. The Burger King® brand is owned by Restaurant Brands International (TSX, NYSE: QSR), a global enterprise with over $35 billion in system-wide sales and more than 28,000 restaurants.

In Japan, BK Japan Inc. is responsible for all domestic marketing and store operations, including the development of new franchisees, menu development, sales strategies, and comprehensive responsibility for store development and new openings.

Company Profile

Company Name: BK Japan Inc.

Representative: Kazuhiro Nomura, President & CEO

Head Office Location: 2F-3F, Front Place Chiyoda Ichibancho, 23-3 Ichibancho, Chiyoda-ku, Tokyo

URL: https://www.burgerking.co.jp

X: https://x.com/BURGERKINGJAPAN

Facebook: https://www.facebook.com/BURGERKINGJP

Instagram: https://instagram.com/burgerkingjp

TikTok: https://www.tiktok.com/@burgerking_japan