Spicy Tuna Onigiri is a delightful Japanese rice ball that combines the bold flavors of spicy tuna with the satisfying texture of perfectly seasoned sushi rice. These delectable bites are not only portable and easy to make but also serve as a wonderful fusion of Asian cuisine that appeals to a wide range of palates. Whether you’re enjoying them as a quick snack, a light lunch, or a fun party appetizer, Spicy Tuna Onigiri delivers a burst of flavor and a satisfying bite that you’ll crave again and again.

Why You Will Love This Recipe
This recipe for Spicy Tuna Onigiri is a fantastic choice for several reasons. First, the combination of spicy tuna, creamy mayo, and aromatic sesame oil creates a flavor explosion that perfectly complements the slightly vinegared rice. The ease of preparation makes it accessible for both novice and seasoned cooks alike—no fancy cooking techniques are required! Additionally, Spicy Tuna Onigiri is ideal for those following a gluten-free or low-carb lifestyle, as it’s packed with protein and healthy fats while being free from wheat-based products. This makes it a satisfying choice for a variety of diets.
Tips and Tricks
To ensure your Spicy Tuna Onigiri turns out perfectly, here are some helpful tips and tricks:
- Use sushi rice or short-grain rice for the best texture. Rinse the rice thoroughly before cooking to remove excess starch, which helps achieve that perfect sticky consistency.
- Let the rice cool to room temperature before forming the onigiri. This helps prevent burns and allows the flavors to meld.
- To add an extra kick, consider incorporating a dash of sriracha or wasabi into the tuna mixture for heightened flavor.
- Keep a small bowl of water handy while shaping the rice balls. Wetting your hands helps prevent the rice from sticking.
Make Ahead Tips
For busy cooks or meal preppers, Spicy Tuna Onigiri can be made in advance. Prepare the spicy tuna mixture a day ahead and store it in an airtight container in the refrigerator. The rice can also be cooked and cooled in advance; just keep it covered with a damp cloth to prevent drying out. Onigiri is best enjoyed fresh, but they can last in the fridge for up to 2 days if stored properly.

Recipe Variations
Feel free to customize your Spicy Tuna Onigiri! Consider swapping out the tuna for sushi-grade salmon, crab, or even tofu for a vegetarian option. You can also experiment with different sauces, such as adding a drizzle of teriyaki or ponzu sauce for a unique twist. For an extra crunch, fold in some finely chopped cucumber or avocado into the filling.
How to Serve
To serve your Spicy Tuna Onigiri, arrange them on a platter with a sprinkle of sesame seeds and sliced green onions for garnish. A side of pickled ginger and a small dish of soy sauce for dipping can enhance the flavor experience. For a beautiful presentation, consider wrapping half of the onigiri in nori (seaweed) for a contrasting texture and flavor.

Pairing Suggestions
Pair your Spicy Tuna Onigiri with a light, crisp Japanese lager or a refreshing iced green tea for a delightful complement to the flavors. For a more indulgent experience, try serving with a citrusy yuzu cocktail. Complementary side dishes include a simple seaweed salad or edamame, and for dessert, consider light green tea mochi or a scoop of matcha ice cream.
How to Store
To store leftovers, place any uneaten onigiri in an airtight container in the refrigerator. They are best consumed within 1-2 days. For freezing, wrap each onigiri tightly in plastic wrap and place them in a freezer-safe bag. They can be frozen for up to a month. When ready to eat, let them thaw in the refrigerator overnight and enjoy at room temperature or gently reheat in the microwave.
Equipment Needed
The only special equipment needed for this recipe is a rice cooker or a pot for cooking the rice. A bamboo sushi mat is optional but can help shape the onigiri if you’re looking for a more uniform appearance. If you don’t have a rice cooker, a heavy-bottomed pot with a lid works just as well.

Dietary Adaptations
For a vegan version of Spicy Tuna Onigiri, substitute the tuna with mashed avocado or cooked chickpeas mixed with spicy mayo. If you’re looking to make this dish gluten-free, ensure your soy sauce is gluten-free, or use tamari instead. For nut-free adaptations, simply omit any nut-based ingredients and stick to the basics.
Seasonal Adaptations
During summer, consider using fresh ingredients like diced mango or cucumber for added freshness. In winter, you might want to incorporate cooked root vegetables like sweet potatoes for a heartier filling. Adjust the spices according to the season, adding warming spices in colder months for a comforting twist.
Recipe FAQs
- Can I use canned tuna instead of fresh? Yes, canned tuna works perfectly for this recipe; just drain it well before mixing.
- How long does it take to cook the rice? Typically, sushi rice takes about 20 minutes to cook, but it’s best to check the specific instructions on your rice package.
- What if I don’t have sushi vinegar? You can make your own by mixing rice vinegar, a little sugar, and salt to taste.
- Can I use brown rice instead of white? Yes, but note that the texture and flavor will be different. Brown rice will also require a longer cooking time.
How To Make Spicy Tuna Onigiri
Spicy Tuna Onigiri

Spicy Tuna Onigiri is a delightful Japanese rice ball that combines the bold flavors of spicy tuna with the satisfying texture of perfectly seasoned sushi rice.
Ingredients
- 1 cup sushi rice
- 1 cup water
- 2 tablespoons rice vinegar
- 1 tablespoon sugar
- 1 teaspoon salt
- 1 can (5 oz) tuna, drained
- 2 tablespoons mayonnaise
- 1-2 tablespoons sriracha (adjust to taste)
- 1 teaspoon sesame oil
- 1 sheet nori (optional, for wrapping)
- Sesame seeds and green onions for garnish
Instructions
- Rinse the sushi rice under cold water until the water runs clear. Drain well.
- In a rice cooker or pot, combine the rinsed rice and water. Cook according to the rice cooker's instructions or bring to a boil, cover, and simmer for 20 minutes until tender.
- Once the rice is done, let it cool slightly. In a small bowl, mix rice vinegar, sugar, and salt until dissolved.
- Gently fold this mixture into the rice while it's still warm, using a wooden spatula. Let it cool to room temperature.
- In a separate bowl, combine the drained tuna, mayonnaise, sriracha, and sesame oil. Mix until well combined.
- Wet your hands with water to prevent sticking. Take a handful of rice and flatten it into your palm. Place a small amount of the spicy tuna mixture in the center.
- Form the rice around the filling, shaping it into a triangle or oval. Repeat with the remaining ingredients.
- If desired, wrap a small strip of nori around the onigiri for added flavor and texture.
- Garnish with sesame seeds and chopped green onions before serving.
Nutrition Information
Yield
4Serving Size
1Amount Per Serving Calories 180Total Fat 10gSaturated Fat 2gTrans Fat 0gUnsaturated Fat 8gCholesterol 3mgSodium 856mgCarbohydrates 20gFiber 1gSugar 6gProtein 2g
Easy Shrimp Recipes.com, occasionally offers nutritional information for recipes contained on this site. This information is provided as a courtesy and is an estimate only. This information comes from online calculators. Although allchickenrecipes.com attempts to provide accurate nutritional information, these figures are only estimates.
Final Thoughts
Spicy Tuna Onigiri is not only a crowd-pleaser but also an opportunity to explore Japanese flavors in your own kitchen. With its endless variations and easy preparation, it’s perfect for any occasion. Whether you make it for a casual lunch or a special gathering, these rice balls are sure to impress. Give this recipe a try, and enjoy the delightful blend of flavors that Spicy Tuna Onigiri brings to your table!