Create Delicious Onigiri Packed with Fillings Easily! Kikkoman Launches New 'Onigirichii Tuna Mayo Corn Flavor' — No Need to Drain Tuna Oil, Less Leakage into Rice!

Kikkoman Foods Co., Ltd. will launch 'Kikkoman Onigirichii Tuna Mayo Corn Flavor,' a new onigiri filling from its 'Onigirichii' series that allows users to easily make onigiri packed with fillings. The product will be available nationwide starting August 24, 2026.

Onigirichii Tuna Mayo Corn Flavor

What is the 'Onigirichii' Series?

The 'Onigirichii' series is a convenient onigiri filling that enables users to easily make onigiri packed with ingredients. One pack allows you to make two onigiri, twice (total of four onigiri).

① Generous, well-balanced fillings!

Packed with ingredients, the flavor seeps into the rice, allowing you to enjoy delicious onigiri until the last bite.

② No mess, no cleanup!

Using plastic wrap, you can make onigiri without getting your hands dirty. Since bowls and dishes are not required, there's no washing up afterward.

③ Nutritionally balanced ingredients!

The fillings include protein-rich ingredients.

How to Make

① Spread approximately 120g of warm rice vertically onto a sheet of plastic wrap.

② Place half of the contents from one pouch on top of the rice.

③ Lift the wrap from the front side, fold it over to enclose the filling, and shape it to your preference.

※ You can also wrap with nori seaweed for added flavor.

Onigirichii Preparation Method

'Kikkoman Onigirichii Tuna Mayo Corn Flavor'

'Onigirichii Tuna Mayo Corn Flavor' is an onigiri filling packed with 100% tuna and sweet corn. The savory tuna mayo flavor, enhanced with soy sauce and dashi from bonito and kelp, pairs perfectly with rice. Compared to typical tuna mayo onigiri, the saltiness has been mellowed (＊1).

'Tuna Mayo' is the most popular onigiri filling in convenience stores (＊2). However, when making tuna onigiri at home, common complaints include 'draining oil is troublesome,' 'moisture and oil leak into rice,' and 'hands and utensils get messy' (＊3). In rankings of popular homemade onigiri fillings, 'Tuna Mayo' does not rank highly (＊4), revealing a gap between 'buying at convenience stores' and 'difficulty making at home.'

With 'Onigirichii Tuna Mayo Corn Flavor,' you can easily make satisfying onigiri without needing to drain tuna oil, and with minimal leakage of moisture or oil into the rice.

Kikkoman will continue to respond to the growing demand for convenience due to changing lifestyles, delivering products that reduce cooking effort while combining delicious taste and high satisfaction.

(＊1) Compared with the tuna mayo onigiri listed on page 64 of 'Daily Meal Calorie Guide, 3rd Edition' edited by Akio Kagawa (published by Japan University of Nutrition)

(＊2) Sakana Japan @ CREST Survey (April 2025 – March 2026)

(＊3) Kikkoman survey conducted in September 2025 (N=312, people who make tuna onigiri)

(＊4) Kikkoman survey conducted in October 2024 (N=300, women who make onigiri at least twice a month)

Details:

1. Product Name, Content Volume & Container, Price (Unit: yen, excluding tax)

Product Name

Content Volume & Container

Suggested Retail Price

(per pouch)

Kikkoman Onigirichii Tuna Mayo Corn Flavor

56g (28g × 2) pouch

220

※ The above suggested retail price is for reference only and does not bind retailers' independent pricing.

2. Release Date: August 24, 2026

3. Sales Area: Nationwide

4. Customer Inquiries: Kikkoman Customer Service Center TEL 0120-120358

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