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Home » Recipes » Onigiri Recipes

Okaka Onigiri (Japanese Rice Balls) Recipe

Published: Oct 20, 2022 · Modified: Jul 2, 2023 · Auther: Juri Austin

5 from 3 votes
JUMP TO RECIPE

Learn how to make a popular Japanese rice ball, Okaka Onigiri! It's flavorful, tasty, and perfect as a quick lunch or a portable snack!

two okaka onigiri rice balls on a plate.

Okaka Onigiri is a delicious and filling Japanese rice ball.

You make an okaka filling by combining katsuobushi (dried bonito flakes) with soy sauce. Then, stuff it in a ball of Japanese rice, form it into a triangle shape, and wrap it using nori seaweed!

How to make it is extremely simple, but the flavor is amazing! I hope you will enjoy it!

    This recipe is for you if:
  • You love onigiri (Japanese rice balls).
  • You want to make okaka onigiri.
  • You are looking for onigiri recipes.
  • You want to know more onigiri variations.

If you're new to Onigiri, don't worry! I'll give straightforward steps for making this tasty treat.

Let me walk you through the ingredients and the instructions. If you want to check the recipe, jump to the recipe. Let's get started!

Jump to:
  • About This Recipe
  • What is Okaka Onigiri?
  • Popular Onigiri Fillings in Japan
  • 📋 Ingredients
  • 🔪Instructions
  • How to Wrap Onigiri in Nori
  • Which nori size do you like?
  • Variations
  • What to serve with
  • Storage
  • Thanks For Stopping By!
  • 📖 Recipe
  • Okaka Onigiri (Japanese Rice Balls) Recipe
  • 💬 Comments

About This Recipe

  • How to Make Okaka Onigiri
  • Include Popular Onigiri Fillings
  • Japanese Ingredients Explained
  • How to Wrap Onigiri in Nori Seaweed

What is Okaka Onigiri?

okaka onigiri rice balls.
Okaka onigiri

Okaka is katsuobushi (shaved bonito flakes) or a mixture of katsuobushi and soy sauce for onigiri and furikake seasoning (Japanese seasoning for rice).

Okaka Onigiri (rice balls) is a traditional Japanese food stuffed with okaka in rice wrapped in nori seaweed.

It's one of the most popular onigiri fillings. With its delicious savory taste, you will enjoy every bite of this classic dish!

Popular Onigiri Fillings in Japan

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

What are the most popular onigiri fillings?

Japan's favorite onigiri fillings are tuna, salmon, and umeboshi. Tarako, okaka (bonito flakes), and kombu seaweed are other top choices among Japanese people!

In case you are wondering what other various fillings we put into Onigiri, this post, 16 Best Onigiri Fillings, will give you all the answers!

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

📋 Ingredients

Here are the main ingredients (amounts are in the recipe card below).

Ingredient list for okaka onigiri.
  • Cooked Rice (short-grain rice)
  • Dried Nori Seaweed Sheet
  • Salt
  • Katsuobushi
  • Soy sauce

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

Japanese Short-grain Rice (Sushi Rice)

Cooked Japanese rice in a pot
Japanese short-grain rice

What type of rice should I use for Onigiri? The answer: Japanese short-grain rice!

Short-grain or sticky rice is the best for making Japanese onigiri. It can hold the shape of a triangle onigiri as it's its stickiness.

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

If you are unsure how to cook Japanese rice, check my recipe How To Cook Japanese Rice On The Stove, where I teach the simple method.

How To Cook Perfect Japanese Rice on The Stove
5 from 8 votes
Make the best fluffy Japanese rice!
Make This Recipe
Japanese short grain rice in a pot

Nori Seaweed

nori sheet.
Nori seaweed

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

At grocery stores, you can find this full-size nori sheet (8.3" x 7.5" or 21 x 19 cm). However, this size is too large for Onigiri (perfect for a sushi roll), so we will divide it into 3.

Katsuobushi

katsuobushi and kezuribushi.
Katsuobushi

Katsuobushi (or bonito flakes) is made from bonito fish. The photo on the left shows smoked bonito (katsuobushi block) made by boiling and smoking raw bonito.

The photo on the right shows katsuobushi (officially called kezuribushi), a smoked bonito shaved very thinly. We use these bonito flakes for everyday cooking.

It's an essential ingredient for Japanese dashi (soup stock) as it has an intense umami flavor. We also use it for garnishing, toppings, and seasonings as well.

You can find more info about Katsuobushi here: Ninben, What's Katsuobushi

🔪Instructions

Now, let's move on to the instructions. I will show you how to make Okaka Onigiri step by step. You can also watch this recipe video.

how to make okaka onigiri.
  1. Cut the nori sheet into three equal pieces.
  2. Put aside the salt, bowl of water, cooked rice, and nori sheet.
  3. Put katsuobushi into a bowl and combine it with soy sauce to make the filling.
  4. Put rice in a small bowl and okaka in the center of the rice.
  5. Wet your hands, put salt on your palm, and form a triangular shape.
  6. Form the rice this way by pressing gently with both your palms.
  7. Wrap it with a nori sheet.
okaka onigiri rice ball on a plate.

Here you go!

Eat right away if you like crispy nori seaweed. Or wait a few minutes for the nori to become a little softer, just like in the photo.

okaka onigiri rice ball on a plate

Let's take a peek inside!

How to Wrap Onigiri in Nori

In this section, we will look at two ways to wrap triangular 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 to wrap nori.

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.

The second method is a little more advanced compared to the first one.

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.

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

two okaka onigiri rice balls on a plate.

I recommend placing the okaka filling on top of an Onigiri, like in the picture above. It's not only easy for you to see what's inside, but it also looks so cute!

Which nori size do you like?

This onigiri recipe uses ⅓ size nori seaweed, but you can try it in different sizes. Here are four different nori sizes that will work for making Onigiri.

nori sheet size and onigiri.

Nori seaweed sizes for Onigiri:

  • Half-size
  • ⅓ size
  • ⅕ size
  • ⅙ size

The most common size is ⅓; I usually go with this too.

Japanese convenience stores sell rice balls using half-size nori sheets. Rice is fully covered, and you can taste the flavor of nori.

Which one do you want to try? Let me know in the comment section below!

Variations

two okaka onigiri rice balls with katsuobushi and soy sauce.

Here is another way to enjoy Okaka Onigiri. You can mix okaka in the rice instead of filling it.

If you like easy onigiri recipes, you can find more here: 17 Easy Onigiri Recipes (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

Onigiri pairs well with anything, such as grilled fish, tamagoyaki (Japanese rolled omelet), stir-fried vegetables, and simmered dishes.

Here is a sample light lunch menu for you!

  • Okaka onigiri
  • Tamagoyaki (Japanese rolled omelet)
  • Tofu Hambagu
  • Daikon Salad With Sesame Dressing
  • Miso Soup

Storage

7 onigiri wrapped in plastic wrap.

If you don't eat Onigiri immediately, please cling wrap each one before they dry.

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).

When you are ready to eat frozen onigiri, use a microwave to warm it (do not thaw it at room temperature as it will dry).

Thanks For Stopping By!

bite shot of okaka onigiri rice ball.

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 Japanese recipes to modern recipes with step-by-step instructions.

More Onigiri Recipes You Might Like

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📖 Recipe

two okaka onigiri rice balls on a plate.

Okaka Onigiri (Japanese Rice Balls) Recipe

5 from 3 votes
Print Pin Save Saved!
Prep: 5 minutes minutes
Total: 10 minutes minutes
Servings: 4 onigiri
Author: JURI
Learn how to make a popular Japanese rice ball, Okaka Onigiri! It's flavorful, tasty, and perfect as a quick lunch or a portable snack!

Equipment

  • 1 Small Bowl
Prevent your screen from going dark

Ingredients
  

  • 14 oz Cooked Japanese Short-grain Rice, 4 small bowls of rice, 400g
  • 2 Nori Sheets
  • 6 tablespoon Katsuobushi, 10g
  • 1 tablespoon Soy Sauce
  • pinch of Salt

Instructions

  • Nori sheet: Cut it into 3 equal pieces.
  • Prepare okaka: Put katsuobushi in a bowl and combine with soy sauce.
  • Collect ingredients: Put aside salt, a bowl of water, cooked rice, nori sheets, and the okaka.
  • Add okaka: Put rice in a small bowl, make a small dent in the center, then add 1 or 2 teaspoons of okaka.
  • 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 with both hands, form a triangle shape (or round shape) by pressing gently with your both palms and fingers while rolling it several times.
  • Wrap: Wrap it with a nori sheet.

Video

Notes

  • 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.
  • Japanese short-grain rice (starchy and sticky) is ideal for making onigiri. If you are new to rice, see "How to Cook Japanese Rice on The Stove."
  • The filling amount is up to you, so feel free to tweak it for your preference.

Nutrition

Serving: 1serving | Calories: 136kcal | Carbohydrates: 29g | Protein: 4g | Fat: 0.2g | Saturated Fat: 0.1g | Sodium: 255mg
Course: Rice
Cuisine: Japanese
Keyword: okaka, onigiri
Did You Make this recipe?Please Leave a star rating!

More Onigiri Recipes

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    17 Easy Japanese Onigiri Recipes Without Nori Seaweed
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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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