Assorted Japanese Onigiri with Multiple Fillings

Assorted Japanese Onigiri with Multiple Fillings is a medium Japanese recipe that serves 4. 250 calories per serving. Recipe by THE YELLOW RICE on YouTube.

Prep: 30 min | Cook: 20 min | Total: 1 hr

Cost: $7.85 total, $1.96 per serving

Ingredients

  • 300 g Sushi rice (sushi‑mai) (Rinse until the water runs clear)
  • 360 ml Water (For cooking the rice (ratio 1:1.2))
  • 30 g Umeboshi (salted and pickled plum) (Pitted, cut into small dice)
  • 150 g Canned tuna (in water) (Drained, flaked)
  • 30 g Mayonnaise (2 tablespoons)
  • 15 ml Soy sauce (1 tablespoon, preferably gluten‑free)
  • 10 g Dried bonito flakes (katsuobushi) (Mixed with a drizzle of soy sauce)
  • 5 g Dried wakame (Rehydrated in cold water for 5 min then chopped)
  • 5 g Sesame seeds (Lightly toasted)
  • 4 pcs Nori sheets (Cut into strips of 2 × 10 cm or 4‑10 cm strips depending on use)
  • 2 c. à café Salt (for moistening hands) (About two pinches, to place on wet hands)

Instructions

  1. Rinsing the rice

    Place the rice in a colander and rinse under cold water, gently rubbing the grains between your hands until the water runs clear.

    Time: PT5M

  2. Cooking the rice

    Put the rinsed rice and water in a saucepan. Bring to a boil, cover, reduce heat to low and simmer for 15 min without lifting the lid, then turn off the heat and let rest for 10 min.

    Time: PT20M

    Temperature: 100°C

  3. Cooling the rice

    Transfer the cooked rice to a large bowl, fluff it with a spatula using cutting motions, then let cool at room temperature for 10 min.

    Time: PT10M

  4. Preparing the fillings

    a) Umeboshi: pit, cut into small dice. b) Tuna: drain, flake, mix with mayonnaise and ½ tablespoon soy sauce. c) Bonito: mix the flakes with the remaining soy sauce. d) Wakame: rehydrate in 30 ml cold water for 5 min, drain, chop, mix with a drizzle of soy sauce and toasted sesame seeds.

    Time: PT10M

  5. Preparing the workstation

    Lightly moisten your hands with water, sprinkle with salt (about two pinches) to prevent the rice from sticking.

    Time: PT2M

  6. Shaping the onigiri (bowl + plastic wrap method)

    a) Place a piece of plastic wrap over a bowl. b) Put 50 g of rice in the center, flatten slightly. c) Add 15‑20 g of filling in the center. d) Cover with an additional 50 g of rice. e) Seal the wrap and, using your hands, shape a triangle by pressing firmly. f) Unwrap the triangle and place a strip of nori halfway up on one side.

    Time: PT10M

  7. Finishing and serving

    Repeat the process for each filling. Arrange the onigiri on a plate, eat immediately or cover with plastic wrap until serving.

    Time: PT3M

Nutrition Facts

Calories
250
Protein
8 g
Carbohydrates
45 g
Fat
5 g
Fiber
2 g

Dietary info: Contains fish, Contains soy, Contains sesame, Gluten‑free if using gluten‑free soy sauce, low-calorie, low-fat

Allergens: Fish (tuna, bonito), Soy (soy sauce, mayonnaise), Sesame

Last updated: April 7, 2026

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Assorted Japanese Onigiri with Multiple Fillings

Recipe by THE YELLOW RICE

Learn how to make triangular onigiri, classic Japanese rice balls, with five different fillings: umeboshi (pickled plum), tuna with mayonnaise, dried bonito flakes, wakame, and sesame seeds. The simplest method uses a bowl and plastic wrap to shape the triangles without the rice sticking to your hands.

MediumJapaneseServes 4

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

Source Video
30m
Prep
30m
Cook
10m
Cleanup
1h 10m
Total

Cost Breakdown

$7.85
Total cost
$1.96
Per serving

Critical Success Points

  • Rinsing the rice until water is clear
  • Cooking the rice with lid closed
  • Shaping with plastic wrap to prevent the rice from sticking

Safety Warnings

  • Be careful of burns when cooking the rice (boiling water).
  • Use a sharp knife to avoid slipping.
  • Do not let children handle hot onigiri.

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