Tuna Rice Balls Japanese

Featured in: Fresh & Light Meals

These Japanese-inspired tuna rice balls combine fluffy rice with a savory tuna mixture, tucked inside and wrapped with crisp nori strips. Quick to prepare and easy to mold by hand, they deliver a satisfying balance of umami flavors and subtle tang. Ideal for lunchboxes, snacks, or light meals, the rice balls feature creamy mayonnaise, a touch of soy sauce, and optional wasabi for a hint of heat. Enjoy them fresh or make ahead for convenient bites. Pair with miso soup or green tea to complete your Japanese-style meal experience.

Updated on Wed, 22 Oct 2025 22:17:00 GMT
Close-up view of savory Tuna Rice Balls, a simple, hand-formed Japanese snack. Save
Close-up view of savory Tuna Rice Balls, a simple, hand-formed Japanese snack. | tastyeffect.com

These tuna rice balls bring together savory creamy tuna with pillowy Japanese rice and a crisp strip of nori for a satisfying handheld snack or light meal They are perfect for quick lunches bento boxes road trips or that mid-afternoon hunger pang

When my kids started school these became a weekly staple in our lunch routine They have never tired of the creamy tuna surprise inside the soft rice and crisp seaweed

Ingredients

  • Japanese short-grain rice: This variety gets sticky and holds its shape beautifully Avoid long grain rice which is too dry
  • Water: Use filtered water for clean rice flavor
  • Salt: Brings out rice sweetness and seasons your hands for shaping
  • Tuna in water: Opt for a high quality tuna that is firm and not too watery Flaked light tuna or solid white both work
  • Japanese mayonnaise: Adds umami tang and creamy texture Kewpie brand is classic but regular mayo works
  • Soy sauce: Depth and savoriness Choose low sodium if you want less salt
  • Lemon juice: Brightens the filling and balances the mayonnaise
  • Wasabi paste: Optional but zesty and flavorsome Go for it if you like a gentle warmth
  • Nori (dried seaweed): Look for crisp sheets that snap easily Glossy and crisp is key
  • Salt: For shaping and seasoning the outside
  • Optional upgrades: Sprinkle of scallion or spoon of pickled ginger for extra flavor layers

Instructions

Prepare the Rice:
Measure out short grain rice and rinse repeatedly under cold water until it runs totally clear Removes excess starch so grains cook up glossy not gluey Combine rice with the measured water in a rice cooker or sturdy pot Cook using rice cooker's normal settings or bring to a boil on the stovetop then reduce heat to very low cover tightly and steam about fifteen to eighteen minutes Do not disturb Let stand covered ten minutes to finish cooking The rice will be delicate plump and sticky
Mix the Tuna Filling:
While the rice is cooking open and drain tuna Place in bowl Separate with fork until fluffy Add mayonnaise soy sauce lemon juice and wasabi paste if using Mix until creamy and evenly flavored For zing add extra wasabi or a pinch of black pepper
Prepare for Shaping:
Once rice is cooked but cool enough to touch fill a small bowl with clean water scatter in some salt Wet your hands to prevent sticking and rub with pinch of salt This seasons the outer rice as you work
Shape the Rice Balls:
Scoop about half a cup of rice into wet palm Flatten into thick disk Spoon tablespoon of tuna filling into center Carefully fold rice up around filling and pinch together Shape firmly but gently into triangle or sphere Don't squeeze too hard or rice will not hold
Add the Nori:
Slice nori sheets into strips Wrap one strip around base or side of each rice ball pressing lightly Nori will hug rice as it absorbs moisture
Repeat and Serve:
Continue with remaining rice and filling Sometimes last one needs less filling Serve at room temperature or pack immediately for lunchbox To store wrap tightly in plastic wrap or parchment
Golden Japanese rice surrounds a delicious filling, Nori wrapped, these Tuna Rice Balls are ready. Save
Golden Japanese rice surrounds a delicious filling, Nori wrapped, these Tuna Rice Balls are ready. | tastyeffect.com

I love how both my kids and their grandparents call these their comfort food The smell of hot steamed rice always brings me back to quick family picnics in the park growing up

Storage Tips

Tuna rice balls are best eaten fresh but can be refrigerated for up to one day Wrap tightly in plastic or reusable wrap to maintain moisture and keep nori from getting too soggy If prepping ahead keep nori strips separate and wrap just before eating for best crunch

Ingredient Substitutions

Short on Japanese rice Try sushi rice or even leftover arborio rice for similar stickiness If you need to avoid mayo use touch of Greek yogurt for creaminess For vegan use mashed chickpeas with vegan mayo and skip tuna

Serving Suggestions

Serve with little bowl of miso soup and cup of green tea For full bento add apple slices pickled radish or edamame Also delicious with drizzle of spicy sriracha or sprinkle of furikake for authentic touch

Cultural and Historical Context

In Japan onigiri are lunchbox classic and soul food eaten everywhere from trains to hiking trails This recipe follows basic tradition but is endlessly variable with fillings Families pass down their unique tweaks generation after generation

Seasonal Adaptations

Add finely chopped cucumber or radish in summer for crunch Swap in leftover cooked salmon for tuna in springtime Stir little shiso or basil into rice for herbal freshness

Homemade Tuna Rice Balls: A quick and tasty lunch idea, perfect for meal prepping. Save
Homemade Tuna Rice Balls: A quick and tasty lunch idea, perfect for meal prepping. | tastyeffect.com

Make a big batch for quick lunches or snacks and enjoy the comfort of homemade onigiri wherever you go

Tuna Rice Balls Japanese

Tender rice balls stuffed with tuna and wrapped in nori offer a tasty Japanese snack for light meals or lunches.

Prep duration
20 min
Cook duration
20 min
Complete duration
40 min
Created by Jane Miller


Skill level Easy

Heritage Japanese

Output 8 Portions

Dietary requirements No dairy

Components

Rice

01 2 cups Japanese short-grain rice
02 2 1/4 cups water
03 1/2 teaspoon salt

Tuna Filling

01 1 can (5 ounces) tuna in water, drained
02 2 tablespoons Japanese mayonnaise or regular mayonnaise
03 1 teaspoon soy sauce
04 1/2 teaspoon lemon juice
05 1/2 teaspoon wasabi paste, optional

Assembly

01 2 sheets nori (dried seaweed), cut into 8 strips
02 Salt, for shaping

Directions

Phase 01

Cook the Rice: Rinse the Japanese short-grain rice under cold water until the water runs clear. Combine rice and water in a rice cooker or saucepan. Cook according to rice cooker instructions or bring to a boil, then cover and simmer for 15 to 18 minutes. Allow the rice to rest, covered, for an additional 10 minutes.

Phase 02

Prepare Tuna Filling: In a bowl, thoroughly mix the drained tuna, mayonnaise, soy sauce, lemon juice, and wasabi paste if desired until the mixture is well combined.

Phase 03

Season Hands for Shaping: While the rice is still warm but manageable, moisten hands with water and sprinkle lightly with salt to prevent sticking.

Phase 04

Form Rice Balls: Take about 1/2 cup of cooked rice and gently flatten it in your palm. Place 1 tablespoon of tuna filling in the center.

Phase 05

Seal and Shape: Carefully mold the rice around the tuna filling, shaping each into a tight triangle or ball, pressing firmly to seal the edges.

Phase 06

Wrap with Nori: Wrap a strip of nori around each shaped rice ball, positioning it at the bottom or along the side.

Phase 07

Finish and Serve: Repeat the process with the remaining rice and filling. Serve immediately or wrap tightly and refrigerate for up to 24 hours.

Necessary tools

  • Rice cooker or saucepan
  • Mixing bowl
  • Sharp knife or scissors
  • Spoon
  • Small bowl of water and salt

Allergy details

Review each component for potential allergens and seek professional healthcare advice if uncertain.
  • Contains fish (tuna), egg (mayonnaise), and soy (soy sauce, possibly mayonnaise).
  • Seaweed (nori) is generally allergen-free, but check for cross-contamination.
  • Always verify ingredient labels if you have allergies.

Nutritional information (per portion)

These values are approximate guides only and shouldn't replace professional medical consultation.
  • Energy: 145
  • Fats: 3 g
  • Carbohydrates: 24 g
  • Proteins: 6 g