MOS Burger launches two limited-edition burgers featuring double slices of Kumamoto-grown tomatoes at 18 stores across Kumamoto Prefecture from January 17 to February 2, 2026, celebrating the traditional "Winter Doyo no Hitsuji Day" custom of eating red foods for good fortune.
The Tradition Behind the Burgers
While "Doyo no Ushi no Hi" in summer is widely known for eating eel, the "Doyo" period actually occurs four times a year, marking the transition between seasons. The winter Doyo period falls from January 17 to February 3, 2026, occurring just before "Risshun" (the beginning of spring).
Within this period, days that correspond to the zodiac sign "Hitsuji" (sheep) are called "Hitsuji no Hi" and occur every 12 days. The 2026 Winter Doyo no Hitsuji days fall on January 21 and February 2. According to tradition, eating red foods like tomatoes and strawberries, or foods with names containing the "hi" sound, brings good luck during this time.
MOS Food Services is participating in this campaign in collaboration with JA Kumamoto Keizairen, supporting their initiative to raise awareness of the "Winter Doyo no Hitsuji Day" tradition.
Featured Burgers with Double Tomatoes
The two new burgers are part of MOS Burger's "New Tobikiri" series, which uses patties made from 100% Japanese beef (the beef content in the patties is 100% domestic). Both burgers feature two generous slices of Kumamoto-grown tomatoes for a juicy, voluminous experience.
New Tobikiri Jumbo Tomato MOS Vegetable Cheese Burger (¥880)
This burger layers Kumamoto tomato slices with a 100% Japanese beef patty and sliced cheese, topped with lettuce, sliced onions, and another layer of Kumamoto tomatoes. The burger is dressed with half-calorie mayonnaise and aurora sauce, delivering a satisfying vegetable-forward flavor.
Notes:
- The cheese is heat-processed at the factory
- The sauce uses tomato ingredients that are not from Kumamoto Prefecture
New Tobikiri Jumbo Tomato Chili Burger (¥880)
This spicier option combines Kumamoto tomatoes with a 100% Japanese beef patty and sliced onions, complemented by another layer of Kumamoto tomatoes. The Japanese-style BBQ sauce and hot chili sauce add a spicy kick that enhances the natural sweetness of the tomatoes.
Notes:
- The sauce uses tomato ingredients that are not from Kumamoto Prefecture
- Not available at Yume Town Hamasen store
Campaign Details
Sales Period: January 17 (Saturday) to February 2 (Monday), 2026 (17 days)
Locations: All 18 MOS Burger stores in Kumamoto Prefecture
- Please check the website for individual store operating hours
Campaign Highlights:
Limited-edition burgers: New Tobikiri Jumbo Tomato MOS Vegetable Cheese Burger (¥880) and New Tobikiri Jumbo Tomato Chili Burger (¥880)
- Available while Kumamoto-grown tomatoes last
Fresh tomato menu items: Menu items using fresh tomatoes will feature Kumamoto-grown tomatoes
- When Kumamoto tomatoes run out, tomatoes from MOS contract farms outside the prefecture will be used
About MOS Food Services
MOS Food Services has consistently focused on providing products based on the principles of "Deliciousness, Safety, and Health" along with "Sincere and Smiling Service." Through their commitment to after-order preparation maintained since the company's founding and product development that values Japanese food culture, they continue to fulfill their mission of "Making people around the world happy through food."
Reference Links:
- MOS Food Services Corporate Site: https://www.mos.co.jp/company/
- MOS Group Environmental and Social Activities "Mori no MOS": https://www.mos.jp/mori/
- MOS Official Online Shop "Life with MOS": https://ec.mos.jp/
All prices listed include tax.
