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Home » Recipes » Onigiri Recipes

Tuna Mayo Onigiri (How To Make Japanese Rice Balls)

Published: Sep 26, 2022 · Modified: Jul 2, 2023 · Auther: Juri Austin

5 from 5 votes
JUMP TO RECIPE

Learn how to make a popular Japanese rice ball, Tuna Mayo Onigiri! With only five simple ingredients, you can have them ready in under ten minutes! Tuna onigiri is perfect for a lunch box or a portable snack on the go!

two tuna mayo onigiri on a plate.

Tuna mayo onigiri is a great snack when you're craving something delicious and easy to make. While you may come across it at your local Japanese store, nothing compares to homemade onigiri!

Learn how to make these simple onigiri with tuna and enjoy the authentic taste. This recipe also includes five delicious variations to enjoy more!

    This recipe is for you if:
  • You love onigiri (Japanese rice balls).
  • You want to make creamy tuna mayo onigiri.
  • You are searching for a tuna onigiri recipe.
  • You are looking for variations of onigiri with tuna.

Let me show you how to make it. If you want to check the recipe immediately, please visit the link below. Let's get started!

Jump to:
  • About This Recipe
  • Tuna Mayo Onigiri: A Quick Introduction
  • Popular Onigiri Fillings in Japan
  • 📋 Ingredients
  • Where to Buy Japanese Ingredients
  • 🔪Instructions
  • Helpful Tips
  • How to Wrap Onigiri In Nori
  • Variations of Tuna Onigiri
  • What To Serve With
  • Storage
  • How to Wrap in Plastic Wrap
  • Other Onigiri Fillings
  • Thanks For Stopping By!
  • FAQ
  • 📖 Recipe
  • Tuna Mayo Onigiri (How To Make Japanese Rice Balls)
  • 💬 Comments

About This Recipe

  • How to Make Tuna Mayonnaise Onigiri
  • Include Popular Onigiri Fillings
  • Japanese Ingredients Explained
  • How to Wrap Onigiri in Nori Seaweed
  • Tuna Onigiri Variations

Tuna Mayo Onigiri: A Quick Introduction

tuna mayo onigiri image.

Onigiri, also known as rice balls, is a traditional Japanese dish and beloved everyday food many people in Japan enjoy.

While triangle onigiri is a common and iconic variation, you can also create round or cylindrical shapes. They are filled with various ingredients, such as fish and vegetables, and then wrapped in nori seaweed.

Tuna is a popular filling for onigiri. This particular variation, tuna mayo onigiri, is a delicious snack that features a creamy and savory filling made with canned tuna and mayonnaise.

If you're a tuna fan or searching for a flavorful and satisfying snack, the tuna onigiri recipe is a must-try!

Popular Onigiri Fillings in Japan

6 popular onigiri, each one is on each plate side by side.

You might be curious about Japan's most popular and traditional fillings for onigiri.

Some favorites include tuna, salmon, umeboshi (pickled plum), tarako (cod roe), katsuobushi (bonito flakes), and kombu seaweed.

If you visit Japan, you can easily find these rice balls at convenience stores (Family Mart, Lowson, and Seven-Eleven) and in ready-made food sections at grocery stores.

If you're looking for more inspiration and ideas for onigiri fillings, my 16 Best Onigiri Fillings recipe has got you covered!

Best Onigiri Fillings (Japanese Rice Balls)
5 from 16 votes
Lots of Onigiri filling ideas for you!
Make This Recipe

📋 Ingredients

Here are the ingredients for Tuna mayo onigiri (amounts are in the recipe card below).

ingredients for tuna mayo onigiri.
  • Cooked Rice (short-grain rice)
  • Nori Seaweed
  • Tuna
  • Japanese-style Mayonnaise
  • Salt

Let's go over each ingredient in the following section.

Japanese Short-grain Rice (Sushi Rice)

Cooked Japanese rice in a pot

What kind of rice should I use for Onigiri? The answer is short-grain rice.

Japanese short-grain rice is the best rice for making rice balls. It can hold the triangle shape of onigiri.

Long-grain types like Jasmine rice and Basmati rice would fall apart as they don't have the right stickiness to hold the rice together, so I recommend using Koshihikari or Japanese sushi rice.

If you are unsure how to cook Japanese rice, check How to Cook Japanese Rice on the Stove, where I teach the simple method.

How To Cook Perfect Japanese Rice on The Stove
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Make the best fluffy Japanese rice!
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Japanese short grain rice in a pot

Nori Seaweed

nori sheet.

Nori is a type of seaweed that's dried, crispy, and sold in sheets like the picture above.

Get this full-size sheet of nori (8.3" x 7.5" or 21 x 19 cm) at local Asian grocery stores. However, this size is too large for onigiri (perfect for a sushi roll), so we will divide it into three.

Tuna

canned tuna and tuna mayo in a small ball.

We use canned tuna, water- or oil-based, depending on your preference, and it's best to drain any excess liquid before mixing with mayo.

Mayonnaise

mayonnaise

You can use regular mayonnaise, but If you are looking for authentic flavor, choose Japanese mayonnaise. Kewpie mayonnaise or Ajinomoto are famous brands.

Where to Buy Japanese Ingredients

If you live in the US, you can find Japanese ingredients in the list below.

  • Japanese market: Mitsuwa Marketplace, Marukai
  • Asian market
  • Whole Foods Market
  • Health food stores
  • Online stores: Instacart, Walmart, Amazon

🔪Instructions

Now, let's move on to the instructions. I'm going to show you how to make onigiri. You can also watch this recipe video.

how to make tuna mayo onigiri step by step.
  1. Cut the nori sheet into three equal pieces.
  2. Put aside salt, a bowl of water, cooked rice, and a nori sheet. Combine tuna and mayonnaise in a small mixing bowl to prepare a tuna mayo filling.
  3. Place rice in a small bowl and tuna mixture in the center of the rice.
  4. Wet your hands, put a little salt on your palm, and form a triangular shape.
  5. Form a triangle shape by pressing gently with both your palms.
  6. Wrap it with a nori sheet.
tuna mayo onigiri on a white plate.

Here you go!

Eat right away if you like crispy nori seaweed. Or wait a few minutes for a softer texture, like in the picture!

tuna mayo onigiri on a plate.

The inside looks like this. Tuna mayo is filled in the center.

Helpful Tips

  • Use short-grain rice: Short-grain rice works best for onigiri as it is sticky and holds its shape well.
  • Use plastic wrap or onigiri molds: To shape the onigiri easily and neatly, you can wrap them in plastic wrap or use onigiri molds. These tools come in handy, especially when the rice is too hot and difficult to shape with your bare hands.
  • The shiny side of the nori sheet: When using nori seaweed, take a close look at the nori sheet. You'll notice that one side is shiny, and the other side is slightly rough. Make sure to place the shiny side facing outward when wrapping the rice. This adds a visually appealing touch to your onigiri.

How to Wrap Onigiri In Nori

In this section, I will show you two ways to wrap Onigiri in a nori sheet.

1. Standard Way

How to wrap onigiri in nori seaweed step by step.

The first one is the most standard way.

Instructions:

  1. Place the triangular-shaped rice in the center of the nori sheet.
  2. Fold the nori sheet to the other side.

That's it! A quick and easy method.

2. Advanced Way

How to wrap onigiri in nori seaweed step by step.

This wrapping method is often seen at onigiri shops and is a little more advanced than the first.

Instructions:

  1. Place the triangular-shaped rice in the center of the nori.
  2. Fold the nori on both sides diagonally.
  3. Fold the lower part of the nori toward the bottom of the rice.

The rice is wrapped from both sides, so you don't have to worry about the rice falling apart when eating.

two tuna mayo onigiri on a plate.

I recommend placing the ingredients on top of Onigiri, like in the picture above. It's easy to see what's inside, but it also looks so cute!

Variations of Tuna Onigiri

5 ways to make tuna mayo onigiri.

More variations for onigiri with tuna? I've got some suggestions for you! You can mix in ingredients like salty and spicy for a savory flavor!

  1. Tuna Mayo and Wasabi: Add spicy Japanese horseradish, called wasabi, to the tuna mayo mixture for a spicy kick.
  2. Tuna Mayo and Soy Sauce: Drizzle soy sauce over the tuna mayo filling for an extra savory flavor.
  3. Tuna Mayo and Shio Kombu: Mix in seasoned kombu seaweed, known as shio kombu, to your rice for a tasty twist. (This is my favorite!)
  4. Tuna Mayo and Kimchi: Mix in some spicy kimchi to add a Korean-inspired twist to your rice. If you're looking for spicy tuna onigiri recipes, try this variation.
  5. Tuna Mayo and Curry: Mix in some curry powder with your rice for a flavorful and aromatic onigiri.
five tuna mayo onigiri on a round plate.

There are endless combinations of onigiri with tuna! I hope you will enjoy exploring all the different flavors and find your favorite ones!

Check this recipe for more Onigiri filling ideas: 17 Easy Onigiri Recipes 🍙 (Japanese Rice Balls) Without Nori Seaweed.

Easy Japanese Onigiri Recipes Without Nori Seaweed
5 from 15 votes
Find your favorite onigiri!
Make This Recipe
12 variations of easy onigiri.

What To Serve With

Tuna mayo onigiri pairs well with various Japanese dishes! Here's an example of a light lunch with a delightful side dish.

  • Tuna Mayo Onigiri
  • Tamagoyaki (Japanese rolled omelet)
  • Tofu Hamburger Steak
  • Daikon Salad
  • Veggie-loaded Kabocha Soup

Storage

7 onigiri wrapped in plastic wrap.

Onigiri is best enjoyed fresh, but if you need to pack them for later, wrap each onigiri tightly in plastic wrap to keep them moist.

You can store them for a couple of days in the fridge and one month in the freezer. When freezing, do not wrap the nori sheet. Heat it in a microwave oven right before eating it (do not thaw it at room temperature as it will dry out).

How to Wrap in Plastic Wrap

Here's how to wrap onigiri in plastic wrap:

how to wrap onigiri in plastic wrap.
  1. Place onigiri on the center of the plastic wrap.
  2. Fold the bottom.
  3. Fold the sides.
  4. Fold the top, and done.
  5. The other side looks like this.
  6. Open the wrap and enjoy!

Other Onigiri Fillings

If you are looking for different fillings, here are more recipes!

  • Kombu Onigiri
  • Salmon Onigiri
  • Ume Onigiri
  • Okaka Onigiri
  • 23 Vegan Onigiri Recipes

Thanks For Stopping By!

five tuna mayo onigiri on a plate.

Thank you for taking the time to read my blog♡ . If you've tried this recipe (or any other recipe on the blog), please give it a star rating below!

Also, feel free to leave comments if you have any questions. I love hearing from you!

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Chef JA Cooks is a Japanese food blog that shares simple and healthy Japanese home cooking recipes, including vegan and vegetarian. From traditional to modern Japanese recipes with step-by-step instructions.

More Onigiri Recipes You Might Like

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FAQ

What are good fillings for onigiri?

There are many delicious fillings you can use for onigiri. Some popular options include tuna, salmon, umeboshi (pickled plum), tarako (cod roe), katsuobushi (bonito flakes), and kombu seaweed.

Can you eat tuna onigiri cold?

Yes, you can eat tuna onigiri cold. In fact, onigiri is a portable snack or lunch on the go, so commonly enjoyed at room temperature or chilled.

How long can tuna onigiri sit out?

Tuna onigiri can generally be left out at room temperature for about 2 hours during the summer, while in the winter time, it can last for up to half a day. However, if you plan to store it for a more extended period, storing it in the fridge or freezer is recommended to maintain its freshness and ensure food safety.

Is Onigiri eaten hot or cold?

Onigiri can be enjoyed both hot and cold, depending on personal preference. It is typically eaten at room temperature or chilled, but some people enjoy it warm or freshly made.

Can I pack onigiri for lunch?

Absolutely! Onigiri is a great option to pack for lunch. The compact shape and portable nature make it an ideal choice for a meal on the go. You can wrap each onigiri individually in plastic wrap or place them in a bento box or airtight container to keep them fresh and secure.

📖 Recipe

two tuna mayo onigiri on a plate.

Tuna Mayo Onigiri (How To Make Japanese Rice Balls)

5 from 5 votes
Print Pin Save Saved!
Prep: 5 minutes minutes
Cook: 5 minutes minutes
Total: 10 minutes minutes
Servings: 4 onigiri
Author: JURI
Learn how to make a popular Japanese rice ball, Tuna Mayo Onigiri! With only five simple ingredients, you can have them ready in under ten minutes! Tuna onigiri is perfect for a lunch box or a portable snack on the go!
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Ingredients
  

  • 14 oz Cooked Japanese Short-grain Rice, 4 small bowls of rice, 400g
  • 2 Nori Sheets
  • pinch of Salt
  • 1 Canned Tuna, 5 oz/140g
  • 2 tablespoon Mayonnaise

Instructions

  • Nori sheet: Cut it into 3 equal pieces.
  • Prepare tuna mayo: Drain the tuna and mix with mayonnaise.
  • Collect ingredients: Put aside salt, a bowl of water, cooked rice, nori sheets, and the tuna mayo.
  • Add tuna mayo: Put rice In a small bowl and make a small dent in the center, then add 1 or 2 teaspoons of tuna mayo.
  • Water and salt on your hands: Wet both hands with water, put some salt (2 fingertips of salt) on your palm and rub between your hands.
  • Shape rice: Place the rice on your hand, hold it with both hands frm a triangle shape (or round shape) by pressing gently with both your palms and fingers while rolling it several times.
  • Wrap: Wrap it with nori sheet.

Video

Notes

  • Equipment: Small bowl (This oxo tot small bowl is perfect for small onigiri)
  • Storage: Wrap each one with plastic wrap, put it in a container, and keep them in the fridge for a couple of days and one month in the freezer.
  • Variations: See the "Variations" section for more tuna mayo onigiri ideas.
  • Japanese short-grain rice (starchy and sticky) is ideal for making onigiri. If you are new to cooking rice, see "How to Cook Japanese Stove on the Stove."
  • The filling amount is up to you, so feel free to tweak it for your preference.

Nutrition

Serving: 1serving | Calories: 213kcal | Carbohydrates: 29g | Protein: 10g | Fat: 5g | Sodium: 134mg | Sugar: 0.01g
Course: Rice
Cuisine: Japanese
Keyword: onigiri, tuna
Did You Make this recipe?Please Leave a star rating!

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Hi, I'm Juri! As a mom of two with three decades of cooking experience, I'm here to guide you in easy Japanese recipes that maximize flavor with minimal ingredients!

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