MOS Launches New 'Avocado Taco Burger' to Refresh Summer with a 'Refreshing' Flavor

MOS Food Services Co., Ltd. (President: Eiso Nakamura, headquarters: Shinagawa-ku, Tokyo), the company behind MOS Burger, will launch the limited-time 'Avocado Taco Burger' at MOS Burger locations nationwide (excluding some stores) from Wednesday, July 15, 2026, through early September. Simultaneously, the 'MOS Tacos Burger' and 'Spicy MOS Tacos Burger,' which surpassed 3 million cumulative sales last year, will also be available.

Last year, the chain introduced the 'MOS Tacos Burger' as a vibrant summer menu item. Tacos have recently gained popularity due to their convenience as handheld meals, colorful ingredients, and high versatility, leading to a rise in specialty taco shops and pop-up events. Capitalizing on this trend, the 'MOS Tacos Burger' stood out with its unique twist—adding miso to the taco sauce—delivering a refreshing yet rich flavor profile that resonated with a wide customer base. Together with the 'Spicy MOS Tacos Burger,' the duo achieved cumulative sales of over 3 million units.

This year, MOS introduces the 'Avocado Taco Burger,' featuring the popular pairing of avocado and tacos. Building on the original 'MOS Tacos Burger,' the addition of creamy avocado, combined with a squeeze of fresh lime served on the side, creates a 'refreshing' taste experience that brightens up the summer season.

Additionally, the beloved 'MOS Tacos Burger' and 'Spicy MOS Tacos Burger' have been enhanced for even greater deliciousness. The key upgrade is the switch to a cheddar cheese-based sliced cheese, intensifying the richness and depth of flavor, and improving the overall balance with the tangy taco sauce and other ingredients.

● 'Avocado Taco Burger' (¥630) *New Item

Topped with cheddar-based sliced cheese and half-calorie mayonnaise on the patty, plus sliced onions for texture. Fresh tomato and creamy avocado—perfectly paired with tacos—are layered and finished with MOS's signature taco sauce. The inclusion of avocado delivers a smooth, mellow flavor. Served with a wedge of lime, allowing customers to customize the taste. A double-patty version, 'Double Avocado Taco Burger,' is also available.

※ Cheese is heat-processed at the factory.

※ The product uses 'Half-Calorie Mayonnaise Type.'

● 'MOS Tacos Burger' (¥570)

Features a patty topped with cheddar-based sliced cheese, half-calorie mayonnaise, and tomato, all nestled in a generous bed of lettuce and drizzled with taco sauce. The sauce is made with abundant tomatoes for a refreshing base, enhanced with spices like chili powder and cumin for aroma. A hint of miso adds sweetness and umami depth. With no intensely spicy ingredients, this burger is enjoyable even for those who are sensitive to heat. A double-patty version, 'Double MOS Tacos Burger,' is also offered.

※ Cheese is heat-processed at the factory.

※ The product uses 'Half-Calorie Mayonnaise Type.'

● 'Spicy MOS Tacos Burger' (¥620)

An upgraded version of the 'MOS Tacos Burger' with the addition of jalapeños. Enjoy the sharp, zesty kick of jalapeños, which pair perfectly with tomato and cheese. A double-patty option, 'Double Spicy MOS Tacos Burger,' is also available.

※ Cheese is heat-processed at the factory.

※ The product uses 'Half-Calorie Mayonnaise Type.'

<New Product Overview>

Product Names & Prices:

'Avocado Taco Burger' (¥630) *New Item

'MOS Tacos Burger' (¥570)

'Spicy MOS Tacos Burger' (¥620)

※ Cheese is heat-processed at the factory.

※ The product uses 'Half-Calorie Mayonnaise Type.'

Sales Period: July 15, 2026 (Wed) – Early September

Sales Locations: Nationwide MOS Burger stores (excluding some)

<Reference>

● MOS Food Services Corporate Site: https://www.mos.co.jp/company/

● MOS Group's Environmental & Social Initiative 'MOS no Mori': https://www.mos.jp/mori/

● Official MOS E-commerce Site 'Life with MOS': https://ec.mos.jp/

※ All prices listed include tax.