When does Osatsu Dokki MOS Shake Coffee Flavor go on sale?

May 18, 2026 at convenience stores nationwide, and May 20, 2026 at select MOS Burger restaurants in Japan.

How much does it cost and what's the size?

190 yen (tax included) for a 40g bag. Pricing at retail stores is open, so it may vary slightly.

Where can I buy this MOS Burger collab snack?

Convenience stores across Japan from May 18, plus select MOS Burger outlets from May 20. Availability differs by region.

What does Osatsu Dokki MOS Shake Coffee Flavor taste like?

Sweet potato crunch layered with creamy milk and coffee notes from MOS Shake, giving a smooth, mellow, well-balanced flavor.

Is this a limited-edition product?

It's a special collaboration release. No official end date was announced, but collab snacks like this typically sell out quickly.

MOS Burger × UHA Mikakuto Osatsu Dokki MOS Shake Coffee Flavor

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Key Takeaways: Osatsu Dokki MOS Shake Coffee Flavor lands at convenience stores nationwide on Monday, May 18, 2026, and at select MOS Burger restaurants from May 20. The 40g bag is 190 yen tax included, though retailers set their own price. It pairs sweet potato chips with the coffee shake MOS has sold since around 1990.

A Buzz-worthy Collaboration Between MOS Burger and UHA Mikakuto

MOS Burger, operated by MOS Food Services, Inc., has teamed up with UHA Mikakuto Co., Ltd.’s popular sweet potato chip brand Osatsu Dokki to launch a new collaborative product, “Osatsu Dokki MOS Shake Coffee Flavor”. The item will be available at convenience stores nationwide in Japan starting Monday, May 18, 2026, and at select MOS Burger restaurants from Wednesday, May 20, 2026.

Coffee Shake Meets Sweet Potato

Osatsu Dokki is a sweet potato chip that highlights the natural sweetness of sweet potatoes. This collaboration combines that flavor with the essence of MOS Shake Coffee. The signature milky richness of MOS Shake harmonizes the sweetness of sweet potato with the character of coffee, creating a smooth, well-balanced and mellow taste.

Product Details

Product Name: Osatsu Dokki MOS Shake Coffee Flavor
Net Weight: 40g
Price: 190 yen (tax included; open price at retail stores)
Release Date: May 18, 2026 (Mon) – Convenience stores nationwide
MOS Burger Stores: May 20, 2026 (Wed) – Select stores

*Release dates may vary by region and store. Please check with individual stores regarding availability.

About MOS Shake

The signature MOS Shake drink, on sale since 1975, celebrated its 50th anniversary in 2025. The current MOS Shake Coffee was born around 1990 and has been a beloved staple for over 30 years.

About Osatsu Dokki

Launched in 1985, Osatsu Dokki celebrated its 40th anniversary last year. By thinly slicing and crisply frying sweet potatoes, it delivers a satisfying crunch while providing dietary fiber.

Conclusion

This collaboration unites two long-loved brands into one snack. Enjoy the aromatic coffee, creamy milk, and natural sweet potato sweetness in this exciting new product.