Mos Burger is celebrating the 30th anniversary of the popular digital pet Tamagotchi with a special collaboration on their kids’ “Mos Waiwai Set.” Starting July 15, 2026, customers across Japan can enjoy this limited-quantity offer featuring four original collectible gifts illustrated with Tamagotchi characters and Mos Burger items.
This collaboration is the second Tamagotchi tie-in this summer following the 2026 Summer Lucky Bag. Since its debut in 1996, Tamagotchi has remained beloved by children and fans of all ages, including teens, young adults, and parents who grew up with the digital pet. After a successful first collaboration last spring, Mos Burger and Bandai teamed up again to offer exclusive goodies inspired by the “Tamagotchi Paradise” theme.
About the Collaboration
Highlights
- The Mos Waiwai Set ranges from ¥560 to ¥680 and includes a burger (options like Waiwai Mos Cheeseburger or Waiwai Teriyaki Burger), small French fries, a drink (apple juice, small orange blend cold drink, or Mos shake for an extra ¥50), plus one collectible gift.
- The allergen-friendly set priced at ¥610 features a pork sandwich made with rice flour, a drink, and a collectible gift. This menu avoids eight major allergens and is suitable for children with dietary restrictions.
- The collaboration runs from July 15 to late September 2026, while supplies last.
- Available at most Mos Burger locations nationwide, excluding some stores.
The special kids’ set lets customers choose one of four collectible items: a holographic sticker set with nine shiny Tamagotchi-themed stickers, a mini clear case with a ball chain, a letter bag sized to hold A5 documents, and a ballpoint pen featuring a cute Mamecchi rubber plate. These gifts come with the purchase of the Mos Waiwai Set or the allergen-friendly drink-and-gift set.
Mos Food Services continues to focus on delivering delicious, safe, and healthy food with heartfelt service, aiming to bring happiness to people worldwide through food.
Menu & Event Details
| Item | Details |
|---|---|
| Name | Mos Waiwai Set Tamagotchi Collaboration |
| Menu / items | Mos Waiwai Set (Waiwai Mos Cheeseburger, Waiwai Burger, Waiwai Cheeseburger, Waiwai Teriyaki Burger, or Waiwai Nuggets) + French Fries S + Drink (Apple Juice, Cold Drink S Orange Blend 100 S, Mos Shake S +¥50) + collectible gift; Low-Allergen Menu Drink and Gift Set (Pork Sandwich <Rice Flour>, Pork Roll <Rice Flour> + Drink + collectible gift) |
| Location | Mos Burger stores nationwide, Japan (some locations excluded) |
| Address | 2-27-1 Kamiosaki, Shinagawa-ku, Tokyo |
| Period | July 15, 2026 – Late September 2026, while supplies last |
| Price | ¥560–¥680 for Mos Waiwai Set; ¥610 for Low-Allergen Menu Drink and Gift Set (tax included) |
| Release date | July 15, 2026 |
