Borderless Kitchen
Four triangular onigiri rice balls wrapped in nori arranged on a wooden board — two classic plain, one with visible salmon filling, one with umeboshi, sesame seeds scattered around
Japanese·20 min·Serves 8 onigiri

Onigiri (Japanese Rice Balls)

Japan's most portable meal. Warm rice, a umami filling, wrapped in nori. The triangle shape is structural — it keeps the rice dense enough to hold together without being compacted to mush. Six fillings, one technique.

The rice must be warm when you shape. Cold rice breaks. Hot rice burns your hands and gets sticky. The window is about 10-15 minutes after cooking.

What You Need

  • 3 cups short-grain Japanese rice, cooked and kept warm
  • 1 tsp salt (for your hands)
  • 8 strips nori (each roughly 3cm × 15cm)
  • A small bowl of water

Choose your fillings (about 1 tbsp per onigiri):

  • Sake (salmon): cooked salmon, skin removed, flaked and seasoned
  • Tuna mayo: canned tuna + Japanese mayonnaise (Kewpie) + pinch of soy sauce
  • Umeboshi: 1 umeboshi plum, pit removed, per onigiri
  • Tarako: salted pollock roe, small spoonful
  • Shio kombu: salt-pickled kelp strips — no preparation needed
  • Okaka: katsuobushi (bonito flakes) + soy sauce, mixed

How to Make It

Wet and salt your hands: Dip hands in water, then rub with a little salt. This prevents sticking and adds seasoning.

Take a portion: Scoop about ½ cup warm rice into one palm. Flatten gently into a rough round.

Add filling: Place about 1 tbsp filling in the center. Fold rice over it.

Shape the triangle: Cup both hands in a V-shape around the rice. Apply gentle, even pressure while rotating the ball. Press with the palm of one hand to create a flat face, two other faces form naturally. Repeat until you have a triangle with three flat faces and defined edges. It should hold its shape without falling apart — but NOT be compressed into a hard ball.

Wrap with nori: Wrap a nori strip around the base, or wrap the full bottom and press to adhere. For konbini-style onigiri, wrap entirely in nori.

Serve immediately or wrap in plastic wrap for up to 4 hours. The nori will soften over time — which some people prefer.


From our Tokyo Meets Tuscany collection.

30 recipes and 6 master sauces in the book.

Get Tokyo Meets Tuscany on Amazon

Paperback · Kindle

Free download

Get the Flavor Pairing Matrix free.

The Italian × Japanese ingredient chart behind every recipe in the book. Printable, one page.