Spicy Tuna Yaki Onigiri aka Japanese rice ball. A fun twist on the traditional filling
SPICY TUNA YAKI ONIGIRI aka Japanese rice ball. A fun twist on the traditional filling! is a easy Japanese recipe that serves 4. 250 calories per serving. Recipe by One Happy Bite on YouTube.
Prep: 15 min | Cook: 8 min | Total: 33 min
Cost: $2.95 total, $0.74 per serving
Ingredients
- 1 can (5 oz) Canned Tuna (drained and flaked)
- 1/4 cup Mayonnaise (regular or light)
- 1 tablespoon Sriracha Sauce (adjust heat to taste)
- 1 teaspoon Rice Vinegar (seasoned rice vinegar preferred)
- 2 cups Sushi Rice (short‑grain Japanese rice, cooked and still warm)
- 2 sheets Nori Seaweed Sheets (cut in half to wrap each ball)
- 2 tablespoons Soy Sauce (low‑sodium preferred)
- 1 tablespoon Cooking Oil (vegetable or canola oil for pan‑frying)
Instructions
Make Spicy Tuna Mixture
In a mixing bowl combine the drained tuna, mayonnaise, and sriracha. Stir with a fork until evenly coated.
Time: PT5M
Season Sushi Rice
Add the rice vinegar to the warm sushi rice and gently fold with a rice paddle or spoon until the rice is lightly seasoned and sticky.
Time: PT3M
Shape Rice Balls
Scoop a spoonful of rice into the triangular Oniiritti mold, press lightly, add a spoonful of the spicy tuna mixture in the center, then top with more rice and press gently to form a triangle.
Time: PT5M
Preheat Pan
Heat the non‑stick skillet over medium heat and add the cooking oil, swirling to coat the surface.
Time: PT2M
Temperature: Medium heat
Pan‑Fry Rice Balls
Place the rice triangles in the skillet, cooking 3‑4 minutes per side until the rice turns golden brown and crispy.
Time: PT6M
Temperature: Medium heat
Brush Soy Sauce
Remove the rice balls and brush each side with soy sauce for a glossy finish.
Time: PT1M
Wrap with Nori
Wrap each rice ball with a half‑sheet of nori, pressing gently so the seaweed adheres.
Time: PT2M
Serve
Arrange the finished spicy tuna rice ball triangles on a plate and serve warm.
Time: PT1M
Nutrition Facts
- Calories
- 250
- Protein
- 12g
- Carbohydrates
- 30g
- Fat
- 8g
- Fiber
- 1g
Dietary info: High protein, Gluten‑free if using tamari instead of regular soy sauce, Contains fish, Contains egg
Allergens: Fish (tuna), Egg (mayonnaise), Soy (soy sauce, nori)
Ingredient Substitutions
- Instead of Canned Tuna: canned salmon, canned chicken
- Instead of Mayonnaise: Greek yogurt, aioli
- Instead of Sriracha Sauce: chili garlic sauce, hot sauce
- Instead of Rice Vinegar: apple cider vinegar, white vinegar with a pinch of sugar
- Instead of Sushi Rice: short‑grain rice, Calrose rice
- Instead of Nori Seaweed Sheets: soy paper, rice paper
- Instead of Soy Sauce: tamari, coconut aminos
- Instead of Cooking Oil: sesame oil (for flavor), olive oil
Equipment Needed
- Mixing Bowl
- Spoon or Spatula
- Oniiritti Mold
- Non‑Stick Skillet
- Pastry Brush
- Cutting Board (optional)
- Knife (optional)
Critical Steps — Do Not Skip
- Mix tuna with mayo and sriracha
- Season sushi rice with rice vinegar
- Shape rice balls using the Oniiritti mold
- Pan‑fry rice balls until golden and crispy
- Brush soy sauce onto the fried rice balls
- Wrap each ball tightly with nori
Chef Tips from the Video
- Use short‑grain sushi rice for the best texture and stickiness.
- Lightly oil the silicone mold before pressing rice to prevent sticking.
- Brush soy sauce while the rice balls are still hot for maximum flavor absorption.
Troubleshooting
Rice balls fall apart when handling.
Make sure the sushi rice is still warm and slightly sticky; add a few more drops of rice vinegar or a pinch of salt to increase stickiness.
Spicy tuna mixture is too dry.
Add an extra teaspoon of mayonnaise or a splash of soy sauce to moisten the mixture.
Rice balls are not crisp after frying.
Increase the pan heat slightly and fry a little longer, ensuring the oil coats the surface evenly.
Storage
Refrigerator: Store unwrapped rice balls in an airtight container for up to 2 days. Re‑heat briefly in a skillet before serving.
Freezer: Freeze unwrapped rice balls in a single layer, then transfer to a zip‑top bag. Thaw in the refrigerator and pan‑fry before serving.
Room temperature: Wrapped rice balls can sit at room temperature for up to 4 hours; after that the nori may become soggy.
Make-Ahead Tips
- Prepare the spicy tuna mixture a day ahead and keep refrigerated.
- Cook and season the sushi rice in advance; keep it covered with a damp cloth.
- Assemble the rice balls and store uncovered in the fridge; fry just before serving.
Frequently Asked Questions
What is the cultural significance and history of spicy tuna rice ball triangles in Japanese cuisine?
Rice balls, or onigiri, have been a staple in Japanese households for centuries as portable meals. The spicy tuna filling is a modern twist influenced by Western-style sushi rolls, adding heat and flavor while keeping the traditional hand‑shaped form.
What are the traditional regional variations of onigiri in Japan compared to this spicy tuna version?
Classic onigiri are often filled with umeboshi (pickled plum), salmon, or kombu. In Kansai, they may be wrapped in nori, while in Hokkaido you’ll find butter‑filled versions. The spicy tuna version reflects contemporary fusion trends rather than a historic regional style.
How is spicy tuna rice ball traditionally served in Japan, and how does this recipe differ?
Traditionally, onigiri are served plain or with simple fillings and eaten at room temperature. This recipe pan‑fries the rice for a crispy exterior, brushes soy sauce for umami, and uses a triangular mold for a cute presentation, adding a modern, snack‑friendly twist.
During which occasions or celebrations are rice balls like these commonly enjoyed in Japanese culture?
Onigiri are popular for picnics, bento boxes, and school lunches. They also appear during festivals and as a quick snack during tea ceremonies. The spicy tuna version works well for casual gatherings or as a party appetizer.
How does this spicy tuna rice ball fit into the broader Japanese cuisine tradition?
It combines the core Japanese concept of rice as a staple with the global popularity of spicy tuna rolls. The technique of pan‑frying adds texture, showing how Japanese home cooking often adapts new flavors while respecting traditional methods.
What are common misconceptions about spicy tuna rice balls in Japanese cooking?
Many think onigiri must be plain or only contain traditional fillings. In reality, modern Japanese households frequently experiment with contemporary ingredients like sriracha and mayo, creating flavorful variations such as this spicy tuna version.
What are the most common mistakes to avoid when making spicy tuna rice ball triangles?
Common errors include using cold rice (which won’t stick), over‑pressing the rice in the mold (making the ball dense), and frying at too high a heat, which burns the exterior before the interior crisps.
Why does this recipe use pan‑frying instead of deep‑frying for the rice balls?
Pan‑frying uses less oil, creates a crisp exterior while keeping the interior soft, and is quicker and safer for home cooks. Deep‑frying would make the rice overly greasy and mask the delicate tuna flavor.
Can I make spicy tuna rice ball triangles ahead of time and how should I store them?
Yes. Prepare the tuna mixture and seasoned rice a day ahead, keep them refrigerated, and assemble the balls shortly before frying. Unfried balls can be stored uncovered in the fridge for up to 2 days; re‑fry before serving.
What does the YouTube channel One Happy Bite specialize in?
The YouTube channel One Happy Bite specializes in quick, approachable Asian‑inspired home cooking videos that focus on snack‑size recipes, easy techniques, and creative twists on classic dishes.
How does the YouTube channel One Happy Bite's approach to Japanese cooking differ from other Japanese cooking channels?
One Happy Bite emphasizes fast, minimal‑equipment recipes perfect for busy home cooks, often using pantry staples and simple molds, whereas many traditional Japanese channels focus on more elaborate techniques and formal presentation.
Last updated: September 2, 2026
