Onigiri (おにぎり), also called omusubi (おむすび), are Japanese rice balls made from warm, sticky short-grain rice. They can be simple and salty, filled with umeboshi or tuna mayo, or seasoned with furikake and wrapped in roasted nori.
The trick isn't complicated, but a few small details make a huge difference. Use freshly cooked Japanese short-grain rice, keep your hands lightly wet, and press firmly enough for the grains to hold together without crushing them. Those points are consistently emphasized across the supplied recipes.
I like making a batch with different fillings so every rice ball is a little surprise. For the best contrast, keep the nori separate until you're ready to eat—the crisp seaweed against warm, tender rice is hard to beat.
Onigiri Recipes
Tender Japanese short-grain rice is shaped into compact triangles with a lightly salted exterior, then finished with nori, furikake, or a small savory filling such as tuna mayo, salmon, or umeboshi.
Prep 20 min
Cook 30 min
Cuisine Japanese
Servings
10
Ingredients
Instructions
Rinse the Japanese short-grain rice in cool water, gently swishing it with your fingers until the water becomes much clearer. Drain well, transfer the rice to a rice cooker, and cook according to the rice cooker's directions. Japanese short-grain rice is important here because its naturally sticky texture lets the rice balls hold their shape.
Let the cooked rice rest for about 5–10 minutes, then gently fluff it. Keep it covered with a damp kitchen towel while you work so the exposed rice doesn't dry out. The rice should still be warm when you shape it.
If making tuna mayo, stir the drained tuna with the Japanese mayonnaise. For salmon, finely shred the cooked salted salmon. For umeboshi, remove the pits and finely chop the plums. Keep your chosen fillings ready before you start shaping.
Mix the warm water with 1/2 teaspoon kosher salt in a small bowl. Dip your hands into the salted water and shake off the excess. Your hands should be damp, not dripping; too much water makes the rice harder to compact.
Scoop about 1/3 cup of warm rice into one hand. For a filled onigiri, press a small hollow into the center and add about 1–2 teaspoons of filling. Cover the filling with a little more rice and gently press the rice together. The supplied recipes consistently use roughly this portion and filling range.
Cup your hands around the rice and shape it into a triangle, pressing firmly enough that the grains stick together. Rotate the rice ball as you work rather than squeezing it continuously in one spot. Three to five gentle rotations are usually enough to create a neat, sturdy shape.
For furikake onigiri, mix a little furikake into warm rice before shaping, or gently press the finished rice ball into furikake so the seasoning coats the outside. Start modestly because many furikake blends are already salty.
Wrap each onigiri with a strip of nori just before serving. If you're packing them for later, keep the nori in a separate container and add it shortly before eating so it stays crisp instead of turning soft.
Enjoy the onigiri while warm or at room temperature. Because cooked rice can support bacterial growth, the supplied Serious Eats recipe recommends eating freshly made onigiri within two hours rather than leaving them out for an extended period.
Notes & Variations
Rice matters most: Don't use jasmine or basmati rice for this recipe. Long-grain rice doesn't have the same cohesive texture, while Japanese short-grain rice gives you the sticky-but-distinct grains needed for shaping. Korean short-grain rice can work as a substitute, although the texture is a little different.
Don't drown your hands: Wet them lightly between rice balls. If your hands are soaking wet, the rice becomes slippery and won't compact as neatly.
Keep nori separate: If you're making lunch ahead, pack the roasted seaweed separately and wrap each rice ball just before eating. That's the easiest way to keep that delicate crunch.
Freezing: One supplied recipe recommends individually wrapping finished rice balls, freezing them on a tray, then transferring them to a freezer bag for up to 3–4 weeks. Reheat one at a time in the microwave until warm.
Nutrition (approx., per serving): Calories: 154 · Protein: 3.2 g · Carbs: 33.4 g · Fat: 0.3 g · Saturated fat: 0.1 g · Cholesterol: 0 mg · Sodium: 388 mg · Fiber: 0.4 g · Sugar: 0 g Estimated values based on the plain salted onigiri version; actual nutrition varies with nori, furikake, and fillings. The supplied source reports 154 calories, 33.4 g carbohydrates, 3.2 g protein, 0.3 g fat, 388 mg sodium, and 0.4 g fiber per rice ball.
FAQ
How do I keep onigiri from falling apart?
Use freshly cooked Japanese short-grain rice and press the rice firmly enough for the grains to cling together. If the rice is cold, dry, or made from long-grain rice, shaping becomes much harder. Keep your hands lightly wet and rotate the rice ball as you press so it forms a compact triangle without crushing the grains.
Why does my onigiri nori get soggy?
Nori becomes soft when it absorbs moisture from the warm rice, so wrap the rice balls immediately before eating if you want crisp seaweed. When packing lunch, keep the nori in a separate bag or container and add it later.
What can I put inside onigiri?
Popular onigiri fillings include tuna mayo, salted salmon (shiozake), umeboshi, okaka, kombu, mentaiko, and tarako. Start with about 1–2 teaspoons of filling per rice ball so there's enough rice around it to seal everything securely.
Can I make onigiri ahead of time?
Yes, but onigiri are best eaten soon after shaping, and the supplied Serious Eats recipe recommends consuming them within two hours. If freezing, individually wrap the rice balls and reheat them until warm; keep nori separate so it doesn't become soggy.
Is onigiri the same as sushi?
No, onigiri and sushi use rice differently. Onigiri starts with plain steamed rice that is shaped and optionally salted or filled, while sushi rice is seasoned with vinegar, salt, and sugar. That's why a good onigiri should taste like warm rice and its filling rather than like sushi.
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Emi Sato is a Japanese home cook based in Tokyo who studied Nutrition and Food Studies. She writes practical, everyday Japanese recipes — soups, rice dishes, noodles, bento, and simple sides.
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