Atom Co., Ltd. (Headquarters: Yokohama City, Kanagawa Prefecture; President & CEO: Takeshi Ueda), part of the Korowaido Group, will launch the limited-time 'King vs. King Summer Battle' at all locations of its conveyor belt sushi brands 'Nigiri no Tokubei' and 'Kaisen Atom' starting Friday, July 17, 2026.

The 'King vs. King Summer Battle' will be held at all 'Nigiri no Tokubei' and 'Kaisen Atom' stores from Friday, July 17, 2026.

This year, the campaign revives the highly popular summer 2025 event 'King vs. King Summer Battle.' We will offer the 'Bluefin Tuna Tasting Set (6 pieces)' and 'King Salmon Tasting Set (6 pieces),' allowing customers to fully enjoy the premium qualities of 'Hon-maguro' (bluefin tuna), the 'king of tuna,' and 'King Salmon,' the 'king of salmon.' This year, the 'King Salmon Tasting Set' has been further enhanced with new flavor combinations, returning in a more delicious and evolved form. Meanwhile, the 'Bluefin Tuna Tasting Set' remains a popular favorite, offering a luxurious experience of the diverse flavors of bluefin tuna in a single serving. It includes akami (lean tuna), chutoro (medium fatty tuna), otoro (fatty tuna), seared otoro, and gunkan-maki topped with sea urchin (uni), showcasing the rich appeal of premium tuna. Notably, the 'Bluefin Tuna Tasting Set' won the Grand Prix in March 2025 at 'Japan Food Selection,' Japan's first food and ingredient evaluation system judged by 23,000 food analysts. Don't miss this opportunity to enjoy a luxurious taste-off between two kings at your nearest Nigiri no Tokubei or Kaisen Atom.

King vs. King Summer Battle Overview

Sales Period: July 17, 2026 (Fri) – August 31, 2026 (Mon)

Participating Stores: 37 'Nigiri no Tokubei' stores and 9 'Kaisen Atom' stores, totaling 46 locations

※ The following 'Nigiri no Tokubei' stores will not participate: Imasu, Inazawa, Tenno, Fusou, Seki, and Kuwana.

Products

Bluefin Tuna Tasting Set (6 pieces)

Bluefin Tuna Tasting Set (6 pieces)

Price: ¥2,013 (tax included)

Bluefin tuna (Kuro-maguro) is considered the most delicious and premium tuna, sometimes called the 'king of tuna' or 'black diamond.' The award-winning 'Bluefin Tuna Tasting Set' allows you to enjoy a variety of bluefin tuna flavors in one set, including akami, chutoro, otoro, seared otoro, and gunkan-maki with uni.

・ Otoro, Uni-toro Gunkan, Toro-tako Gunkan, Chutoro

・ Akami, Seared Toro

King Salmon Tasting Set (6 pieces)

King Salmon Tasting Set (6 pieces)

Price: ¥1,738 (tax included)

The ultimate King Salmon worthy of its royal name.

King Salmon, prized for its vibrant orange flesh and melt-in-your-mouth texture, returns even more delicious than last year. The classic 'nigiri' allows you to enjoy the salmon's pure, rich flavor directly. 'Mayo Avocado' offers a salad-like, foolproof deliciousness. 'Ikura-topped Gunkan' delivers a luxurious taste with the richness and pop of salmon roe. 'Kiwi-topped' combines prosciutto, cottage cheese, onion, and kiwi for a novel flavor profile blending sweetness and saltiness. 'Cheese-torched' features the savory aroma of torching and the rich depth of cheese—a must-try. 'Oshi-zushi' (pressed sushi) sandwiches tai miso (sea bream miso) and green onion between rice and topping, wrapped in oboro kombu for a flavorful yet gentle mouthfeel. Each of these six pieces offers a unique charm. Please savor the further evolved 'King Salmon Tasting Set.'

・ Nigiri, Mayo Avocado, Ikura-topped Gunkan, Kiwi-topped, Cheese-torched, Oshi-zushi

Order as a set and save ¥66!! [King Tasting Combo Set]

{Shareable! Save with the combo!} King Tasting Combo Set

{Shareable! Save with the combo!} King Tasting Combo Set

Price: ¥3,685 (tax included)

The 'King Tasting Combo Set,' combining the Bluefin Tuna and King Salmon tasting sets, saves you ¥66 compared to ordering them separately!

Indulge in a luxurious comparison of bluefin tuna's rich umami and king salmon's buttery texture. Enjoy it solo to your heart's content, or share it with family and friends. Savor this blissful tasting experience at a great value.

About Nigiri no Tokubei and Kaisen Atom

＜Nigiri no Tokubei＞

Nigiri no Tokubei is a conveyor belt sushi chain with 43 stores, primarily in the Tokai region, offering a dining experience centered on 'vitality,' 'seasonality,' and 'tradition.' With energetic service and bright smiles, we serve authentic sushi crafted using time-honored techniques with fresh, high-quality ingredients sourced with care for origin and peak freshness. We welcome our customers with a focus on 'bluefin tuna,' 'seasonal fresh fish,' and 'traditional craftsmanship.'

・ HP: https://www.nigirinotokubei.com/

・ X: https://twitter.com/tokubei1971

・ Instagram: https://www.instagram.com/tokubei1971/

Nigiri no Tokubei Brand Logo | Nigiri no Tokubei Store Exterior Image

＜Kaisen Atom＞

Kaisen Atom operates 9 stores across Fukui Prefecture, offering conveyor belt sushi that lets customers fully enjoy locally sourced ingredients. In addition to staples like bluefin tuna, popular menu items showcase Fukui's local flavors, including 'Yaki-saba' (grilled mackerel), a regional specialty, 'Beni-zuwai Crab' with its delicate, tender texture and mild sweetness, and 'Buri Tekka Maki,' a roll of fresh yellowtail and shiso leaf. We also offer dry sake from Fukui, perfect with sushi.

・ HP: https://www.kaisenatom.com/

・ X: https://twitter.com/kaisenatom

・ Instagram: https://www.instagram.com/kaisenatom/

Kaisen Atom Brand Logo | Kaisen Atom Store Exterior Image

Introducing the Atom App

The integrated app, 'Atom App,' brings together 'Steak Miyako,' 'Kalbi Taisho,' 'Gankotei,' 'Nigiri no Tokubei,' 'Kaisen Atom,' and 'Katsu Toki' into one platform.

With just one app, you can manage information for each brand, receive coupons, and use the 'Atom Visit Common Point Card.'

The Atom Common Visit Points are awarded when you scan a QR code in-store after payment, giving you 10 points per visit. Accumulate 50 points to exchange for a '¥500 coupon' redeemable at any brand. For details on point accrual conditions, please check the app. Make your dining experience more convenient and rewarding—download the app today!

Atom App 'Atom Common Visit Point Card'

Download here

FACT BOX

  • Source: PR TIMES
  • Category: キャンペーン