How much is Zetteria's Unadon Burger?

It's 990 yen (tax included) — under 1,000 yen, making it an affordable way to enjoy an eel dish for the Day of the Ox.

When does the Unadon Burger go on sale?

It launches Wednesday, July 22, 2026, and runs until early August 2026 while supplies last.

What's inside the Unadon Burger?

Grilled kabayaki eel, a 100% Japanese rice patty grilled with soy sauce, a soft egg, special teriyaki sauce, and lettuce in a fluffy bun.

Is the Unadon Burger available at all Zetteria stores?

It's planned for 268 locations, excluding some stores. Daily sales end once that day's stock runs out, so timing matters.

Does the Unadon Burger come with sansho pepper?

Yes, sansho pepper is included. Adding it brings out a more authentic unadon flavor to match the eel and rice patty.

Zetteria "Unadon Burger" Returns at 990 Yen

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Key Takeaways：Zetteria is bringing back its fan-favorite Unadon Burger from July 22, 2026, for 990 yen (tax included) as a limited-run treat for the Day of the Ox. It layers thrice-grilled kabayaki eel, a soy-sauce-grilled 100% Japanese rice patty, soft egg, and teriyaki sauce in a bun — an affordable, handheld take on the classic eel rice bowl. With supply increased this year, it’s an easy way to enjoy a seasonal eel tradition for under 1,000 yen while stock lasts.

Zetteria’s “Unadon Burger” Returns for a Limited Time

Zetteria, the hamburger chain operated by Burger One Co., Ltd. under the Zensho Holdings group, will once again offer its “Unadon Burger” for a limited time starting Wednesday, July 22, 2026. First launched last year to a strong response, the burger is positioned as a new way to enjoy the Day of the Ox (Doyo no Ushi no Hi). This year the company has increased the available quantity so more customers can enjoy it.

A Japanese-Style Burger That Recreates “Unadon”

The “Unadon Burger” layers grilled eel (kabayaki), a rice patty made from 100% Japanese-grown rice, a soft-cooked-style egg, a special teriyaki sauce, and lettuce inside a fluffy, chewy bun — a true recreation of a rice-bowl eel dish (unadon) in burger form. Priced under 1,000 yen, it offers an easy, satisfying take on this seasonal tradition.

Grilled Three Times for a Fragrant Kabayaki

Zetteria’s eel is brushed with sauce and grilled three times over to achieve a fragrant, plump kabayaki finish. The special teriyaki sauce — based on a sweet eel glaze and rich soy sauce — mingles beautifully with the eel and the soft egg, delivering deep, savory flavor in every bite.

A Rice Patty Grilled with Soy Sauce

The 100% domestic rice patty is brushed with soy sauce before grilling, giving it a fragrant aroma and a chewy texture. Adding the included sansho pepper brings out an even more authentic unadon flavor.