Japanese Onigiri (Rice Balls) with Various Fillings

Japanese Onigiri (Rice Balls) with Various Fillings is a easy Japanese recipe that serves 6. 210 calories per serving.

Prep: 35 min | Cook: 25 min | Total: 1 hr 10 min

Cost: $123.98 total, $20.66 per serving

Ingredients

  • 3 rice cooker cups (about 540g uncooked, 4.5 US cups cooked) Japanese short-grain rice (Essential for proper onigiri texture)
  • as needed Water (For cooking rice and wetting hands/mold)
  • 1-2 teaspoons Salt (For seasoning rice and hands)
  • 2-3 sheets Nori (seaweed) sheets (Cut into thirds for wrapping)
  • 1/2 fillet (about 80g) Cooked salmon (Salted or leftover salmon, flaked)
  • 1 can (about 5 oz/140g) Tuna (canned, drained) (For tuna mayo filling)
  • 2 tablespoons Japanese mayonnaise (For tuna mayo filling)
  • 1 teaspoon Soy sauce (For tuna mayo and okaka fillings)
  • 1/4 cup Bonito flakes (katsuobushi) (For okaka filling)
  • 2-3 whole Umeboshi (Japanese pickled plum) (Seed removed, flesh only)
  • 1-2 tablespoons Mentaiko (spicy salted cod roe, optional) (Membrane removed)
  • as needed Furikake rice seasoning (optional) (For coating rice balls)

Instructions

  1. Cook the Rice

    Rinse 3 rice cooker cups of Japanese short-grain rice until the water runs clear. Cook in a rice cooker with the appropriate amount of water, or use a pot with a lid on the stovetop. Once cooked, fluff the rice and keep it covered to maintain warmth.

    Time: PT25M

  2. Prepare Fillings

    While rice cooks, prepare your fillings: Flake cooked salmon. For tuna mayo, mix drained canned tuna with Japanese mayonnaise and a drizzle of soy sauce. For okaka, mix bonito flakes with a splash of soy sauce. For umeboshi, remove the seed and use the flesh. For mentaiko, gently remove eggs from the membrane. Place each filling in a separate small bowl.

    Time: PT10M

  3. Prepare Nori Sheets

    Toast nori sheets over an open flame for a few seconds on each side until crisp (optional). Cut each sheet into thirds parallel to the lines on the nori. Set aside.

    Time: PT3M

  4. Prepare Hands, Plastic Wrap, or Mold

    Set up a small bowl of water and another with salt. Wet your palms to prevent sticking, then rub a pinch of salt on your hands. Alternatively, line a rice bowl or onigiri mold with plastic wrap and sprinkle with salt. If using a mold, soak it in water first.

    Time: PT2M

  5. Shape Onigiri (Hand Method)

    Scoop a handful of warm rice (about 1/2 cup) onto your palm. Make a small indentation in the center and add about 1 teaspoon of filling. Cover with more rice. Gently press and shape the rice into a triangle, ensuring the filling is sealed inside. Repeat for remaining rice and fillings.

    Time: PT10M

  6. Shape Onigiri (Plastic Wrap Method)

    Place plastic wrap in a bowl, sprinkle with salt, add rice and filling as above, cover with more rice, gather the wrap, and shape into a triangle. Unwrap and set aside.

    Time: PT5M

  7. Shape Onigiri (Mold Method)

    Soak the onigiri mold in water. Sprinkle with salt, fill halfway with rice, add filling, cover with more rice, press with the lid, then unmold onto parchment-lined baking sheet or plate.

    Time: PT5M

  8. Coat or Wrap Onigiri

    Optionally, roll the sides of the onigiri in furikake. Wrap each onigiri with a strip of toasted nori. For crispy nori, wrap just before eating.

    Time: PT3M

  9. Serve or Pack

    Serve immediately, or pack into a lunchbox. If storing, keep onigiri covered with plastic wrap or in an airtight container.

    Time: PT2M

  10. Cleanup

    Wash all bowls, utensils, mold, and surfaces used. Wipe down counters and store leftover ingredients.

    Time: PT10M

Nutrition Facts

Calories
210
Protein
5g
Carbohydrates
40g
Fat
3g
Fiber
1g

Dietary info: Dairy-free, Nut-free, low-calorie, low-fat

Allergens: Fish, Egg (in mayonnaise), Soy (in soy sauce), Wheat (if using regular soy sauce)

Last updated: March 12, 2026

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Japanese Onigiri (Rice Balls) with Various Fillings

Classic Japanese onigiri (rice balls) with a variety of traditional fillings, shaped by hand, plastic wrap, or a mold. Perfect for snacks or lunch boxes, with step-by-step instructions for each method and tips for keeping your onigiri fresh and delicious.

EasyJapaneseServes 6

Shop all ingredients on Amazon in one click • Printable PDF with shopping checklist

Source Video
40m
Prep
35m
Cook
10m
Cleanup
1h 25m
Total

Cost Breakdown

$123.98
Total cost
$20.66
Per serving

Critical Success Points

  • Cooking the rice properly and keeping it warm and moist.
  • Salting and wetting hands or mold to prevent sticking and season the rice.
  • Shaping the onigiri gently to avoid crushing the rice or having the filling leak out.

Safety Warnings

  • Use caution when toasting nori over an open flame.
  • Wash hands thoroughly before handling rice.
  • Do not leave onigiri at room temperature for more than 6 hours to avoid foodborne illness.

Frequently Asked Questions

Everything you need to know about this recipe

Q

What is the cultural significance and history of Japanese Onigiri (Rice Balls) in Japanese cuisine?

A

Japanese Onigiri (Rice Balls) have been a staple of Japanese food culture for centuries, originally serving as portable meals for travelers, soldiers, and workers. They embody the Japanese values of simplicity, seasonality, and respect for rice, and are often associated with comfort and nostalgia.

cultural
Q

What are the traditional regional variations of Japanese Onigiri (Rice Balls) within Japan?

A

Regional variations of Japanese Onigiri (Rice Balls) include Osaka's takoyaki‑filled balls, Hokkaido’s salmon and kelp (kombu) fillings, and Kyushu’s spicy kimchi or pickled plum (umeboshi) versions. Each region incorporates locally abundant ingredients while keeping the core rice‑and‑nori structure.

cultural
Q

How is Japanese Onigiri (Rice Balls) authentically served in different regions of Japan?

A

In many parts of Japan, Japanese Onigiri (Rice Balls) are served wrapped in fresh nori seaweed and placed in bento boxes or sold at convenience stores. In some regions they are presented on wooden plates with accompanying pickles, and during festivals they may be grilled or lightly toasted for extra flavor.

cultural
Q

What occasions or celebrations is Japanese Onigiri (Rice Balls) traditionally associated with in Japanese culture?

A

Japanese Onigiri (Rice Balls) are traditionally enjoyed during school lunches, picnics, and seasonal festivals such as Obon, where they are packed for travel. They are also a common offering in Shinto shrine festivals as a simple, portable food for participants.

cultural
Q

How does Japanese Onigiri (Rice Balls) fit into the broader Japanese cuisine tradition?

A

Japanese Onigiri (Rice Balls) exemplify the Japanese emphasis on rice as the foundation of meals and the art of minimal yet flavorful seasoning. They complement other staples like miso soup, pickles, and grilled fish, reinforcing the balance of textures and tastes central to Japanese cuisine.

cultural
Q

What are the authentic traditional ingredients for Japanese Onigiri (Rice Balls) versus acceptable modern substitutes?

A

Authentic ingredients for Japanese Onigiri (Rice Balls) include Japanese short‑grain rice, a pinch of salt, nori seaweed sheets, and traditional fillings such as salted salmon, umeboshi plum, or kombu. Modern substitutes can include sushi‑grade rice, pre‑cooked canned salmon, and roasted seaweed snacks, though they may slightly alter texture and flavor.

cultural
Q

What other Japanese dishes pair well with Japanese Onigiri (Rice Balls) for a balanced meal?

A

Japanese Onigiri (Rice Balls) pair beautifully with miso soup, a side of pickled vegetables (tsukemono), tamagoyaki (Japanese rolled omelette), and a small portion of simmered protein like teriyaki chicken. This combination offers a harmonious balance of protein, carbs, and umami typical of a Japanese lunch.

cultural
Q

What are the most common mistakes to avoid when making Japanese Onigiri (Rice Balls) using the hand‑shaping method?

A

Common mistakes include using the wrong type of rice (long‑grain instead of Japanese short‑grain), over‑salting the rice, shaping the balls while the rice is too hot, and pressing too hard, which makes the texture dense. Letting the rice cool slightly and using gentle, even pressure yields a soft, fluffy Onigiri.

technical
Q

Can I make Japanese Onigiri (Rice Balls) ahead of time and how should I store them to keep them fresh?

A

Yes, you can prepare Japanese Onigiri (Rice Balls) ahead of time. Wrap each ball tightly in plastic wrap, place them in an airtight container, and refrigerate for up to two days. Before serving, let them reach room temperature or lightly steam them to restore softness.

technical
Q

What does the YouTube channel Unknown specialize in regarding Japanese cooking, as demonstrated in the Japanese Onigiri (Rice Balls) video?

A

The YouTube channel Unknown specializes in simple, authentic Japanese home‑cooking tutorials, focusing on step‑by‑step demonstrations of classic dishes like Japanese Onigiri (Rice Balls) and other bento‑friendly recipes. The channel emphasizes traditional techniques while offering practical tips for busy cooks.

channel
More like this:Japanese Recipes

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