Tuna Mayo Onigiri

User Reviews

4.6

52 reviews
Excellent
  • Prep Time

    10 mins

  • Cook Time

    20 mins

  • Total Time

    30 mins

  • Servings

    3 servings

  • Calories

    487 kcal

  • Course

    Main Course

  • Cuisine

    Japanese

Tuna Mayo Onigiri

Tuna Mayo Onigiri is a Japanese rice ball filled with a creamy tuna and mayonnaise mixture. It features seasoned cooked short-grain rice shaped by hand around a savory tuna filling, then wrapped with fragrant sesame leaves or alternatives like green shiso or nori. The rice provides a sticky and tender texture pairing with the smooth, umami-rich filling. This recipe involves carefully mixing tuna with Japanese mayonnaise and soy sauce for balanced flavor, while watering and salting hands helps achieve cohesive onigiri shapes.

Description

The Tuna Mayo Onigiri uses Japanese short-grain rice cooked with a precise water ratio to yield sticky, tender grains essential for shaping. The filling blends drained canned tuna with mayonnaise and soy sauce, creating a creamy yet savory mix. Hands are wetted and salted before shaping rice to prevent sticking and add a light seasoning. Each onigiri is formed by creating a well in the rice ball and filling it with tuna mayo before sealing and wrapping in sesame leaves, shiso, or nori. The finishing leaf adds a subtle herbal or seaweed note to complement the mild, creamy filling.

This type of onigiri makes a convenient handheld snack or light meal often enjoyed in Japanese cuisine. The tuna mayo filling is rich, contrasting with the neutral rice, making it satisfying. Wrapping with sesame leaves or nori enhances aroma and texture. This dish can be prepared ahead and is portable for lunches or picnics.

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Ingredients

Servings
  • 1 ½ cups Japanese short-grain rice 2 rice cooker cups
  • 1 ⅔ cups water cold
  • 85 grams tuna 1 small US can, chunk in oil
  • 3 tablespoons mayonnaise such as Kewpie, Japanese
  • 1 teaspoon soy sauce
  • 6 sesame leaves green shiso or nori will work too, wild
  • salt

Instructions

  1. Wash and cook the rice according to the directions in my sushi rice recipe (but use the proportion of 1 ½ cups Japanese short-grain rice and 1 ⅔ cups cold water in this recipe).
  2. While the rice cooks, open the can of 85 grams chunk tuna in oil and drain out any excess liquid. Add the tuna to a bowl along with the 3 tablespoons Japanese mayonnaise and 1 teaspoon soy sauce. Mix well to form a uniform paste.
  3. Prepare a bowl of water and a small bowl of Salt.
  4. When the rice is cooked, stir it to fluff and then transfer it to a bowl to cool slightly and cover it with a damp towel to keep it from drying out.
  5. When the rice is cool enough to handle but still on the hot side, wet your hands in the water bowl. Dab your index finger in the bowl of salt and rub the salt around your hands.
  6. Working quickly, scoop ⅙ of the rice into your non-dominant hand and make a little well in the center of the rice.
  7. Add about 2 teaspoons of tuna mayo filling into the well and cover the tuna with the surrounding rice.
  8. Cup the hand holding the rice like a taco and then use 2-3 fingers of your opposite hand to shape the rice into a triangle.
  9. Toss the rice ball onto another side and then repeat the cupping and shaping step. Repeat until the onigiri is the desired shape.
  10. Wrap the Tuna Mayo Onigiri with 6 wild sesame leaves, and repeat steps 5-10 until you run out of rice.

Nutrition Information

Show Details
Calories 487kcal (24%) Carbohydrates 74g (25%) Protein 14g (28%) Fat 13g (20%) Saturated Fat 2g (10%) Cholesterol 15mg (5%) Sodium 324mg (14%) Potassium 201mg (4%) Fiber 1g (4%) Sugar 1g (2%) Calcium 30mg (3%) Iron 1mg (6%)

Nutrition Facts

Serving: 3servings

Amount Per Serving

Calories 487 kcal

% Daily Value*

Calories 487kcal 24%
Carbohydrates 74g 25%
Protein 14g 28%
Fat 13g 20%
Saturated Fat 2g 10%
Cholesterol 15mg 5%
Sodium 324mg 14%
Potassium 201mg 4%
Fiber 1g 4%
Sugar 1g 2%
Calcium 30mg 3%
Iron 1mg 6%

* Percent Daily Values are based on a 2,000 calorie diet.

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Overall Rating

4.6

52 reviews
Excellent

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