Short answer
To make an onigiri, cook short-grain rice, let it cool until you can handle it, wet your hands and add salt, press rice around a filling into a triangle, and wrap the base with a strip of nori. The whole job takes about 15 minutes.
To make an onigiri, cook short-grain Japanese rice, let it cool until it is warm enough to handle, wet your hands and add a little salt, press the rice around a filling into a triangle, and wrap the bottom with a strip of nori. The whole job takes about 15 minutes once the rice is ready.
What is an onigiri?
An onigiri is a Japanese rice ball made from cooked short-grain rice, shaped by hand into a triangle, circle or cylinder, usually with a filling in the middle and nori seaweed on the outside. It is also called omusubi, and many people simply say rice ball.
Onigiri is a portable meal sold in Japanese convenience stores and packed in lunch boxes. It is not sushi, because the rice is plain and lightly salted rather than seasoned with vinegar.
What ingredients do you need for onigiri?
An onigiri needs cooked short-grain rice, salt, nori and a filling. That is the entire list for a classic rice ball.
- 2 cups (about 400 g) uncooked short-grain Japanese rice, which makes about 4 to 6 rice balls
- Water for cooking, as directed on the rice package
- Fine salt for your hands
- Nori sheets, cut into strips about 2 inches wide
- Fillings (see the table below)
Short-grain rice is the key. Its high starch content makes it sticky enough to hold a shape. Long-grain rice such as basmati crumbles and will not work.
How do you cook the rice?
Rinse the rice in cold water until the water runs mostly clear, then cook it with the water amount on the package, or slightly less so the grains hold firm. Let it steam for 10 minutes after cooking.
- Rinse the rice in several changes of water, swirling gently.
- Drain and let it sit for 15 to 30 minutes.
- Cook in a rice cooker or covered pot using the package ratio.
- When done, rest for 10 minutes with the lid on.
- Fluff with a wet paddle and let it cool until it is hot but handleable.
Hot rice shapes well and sticks together better than cold rice. Cool it only enough to protect your hands.
What are the most common onigiri fillings?
The most common onigiri fillings are salted salmon, tuna with mayonnaise, pickled plum (umeboshi) and kombu seaweed. Other options include seasoned cod roe, bonito flakes with soy sauce and plain sesame salt.
| Filling | Flavor | Prep needed |
|---|---|---|
| Salted salmon | Savory, mild | Grill or pan-cook and flake |
| Tuna mayo | Creamy, savory | Mix canned tuna with mayo and soy |
| Umeboshi | Sour, salty | Remove pit, use a small piece |
| Kombu tsukudani | Sweet soy seaweed | Ready from a jar |
| Bonito and soy | Smoky, savory | Mix flakes with soy sauce |
| Plain | Light, salty | None |
Keep fillings fairly dry and chopped small so they do not make the rice soggy or push out of the rice ball.
How do you shape an onigiri step by step?
To shape an onigiri, wet your hands with water, rub in a pinch of salt, scoop about half a cup of rice, press a hollow in the center, add the filling, close the rice over it and mold into a triangle with three or four gentle presses.
- Fill a small bowl with water and add a pinch of salt.
- Wet your hands, then rub a little salt on your palms.
- Place about half a cup (100 g) of warm rice in one palm.
- Make a small dent and add about a teaspoon of filling.
- Fold the rice over the filling and press it closed.
- Cup one hand to form the peak of the triangle, and rotate the ball as you press with the other hand.
- Make three or four light presses, not one hard squeeze.
The rice should hold together, but remain light inside. Hard pressing makes a dense, pasty rice ball. If the rice sticks to your hands, wet them again.
How do you wrap onigiri with nori?
Wrap a strip of nori around the base of the rice ball and press the ends to stick them together. Nori sticks to warm, moist rice without any glue.
Dry nori turns soft quickly when it touches moist rice. For a crisp wrapper, many people pack nori separately and wrap just before eating. Convenience store onigiri use a double film wrapper that keeps the nori away from the rice until you pull the film open.
What are common onigiri mistakes?
The most common onigiri mistakes are using the wrong rice, pressing too hard, adding a wet filling, forgetting salt and letting the rice go cold before shaping.
- Wrong rice: long-grain varieties will not stick.
- Too much pressure: the rice becomes dense and gummy.
- Wet fillings: they leak and make the rice soggy.
- No salt: the outer rice tastes flat.
- Cold rice: it will not hold and cracks.
A lightly oiled tray and a damp cloth to wipe your hands make the process cleaner.
How do you store and pack onigiri?
Wrap each onigiri individually in plastic wrap or foil and eat it the same day. Refrigerating cooked rice makes it hard, so keep it in a cool bag for a short trip.
- Wrap tightly to prevent drying.
- Keep nori separate if you want a crisp wrap.
- For longer storage, refrigerate, then warm in a microwave for 20 to 30 seconds.
- Freeze wrapped rice balls for up to a few weeks, and thaw before warming.
Use the same food-safety care you apply to any cooked rice dish, and refrigerate leftovers promptly.
Is onigiri on the menu at Minnano Japanese Grocery?
Onigiri is not on a published menu. Minnano Japanese Grocery is a store, not a restaurant, and no prepared-food list is published for it.
One listing on Atly mentions onigiri as a reviewer favorite, and a local Google reviewer mentions freshly made food, but neither is a confirmed menu. This guide is independent and takes no orders. If you want to know what is on the shelf today, call (210) 340-7900, check the hours and location page for opening times and see the FAQ page for other common questions.
What are easy variations on a basic onigiri?
Easy variations include grilled onigiri, rice mixed with furikake before shaping, onigiri rolled in toasted sesame and rice balls made without a filling. Each uses the same shaping method.
- Furikake rice balls: stir furikake through the rice, then shape with no filling.
- Yaki onigiri: shape unfilled rice balls, brush with soy sauce and pan-fry until crisp.
- Sesame onigiri: roll the shaped ball in toasted sesame seeds and salt.
- Cheese onigiri: tuck a small cube of cheese in the center.
Start with the plain triangle, since once the rice and pressing feel right, every variation is easy.
Common questions
Why does my onigiri fall apart?
The rice is usually the wrong type, too wet, or too loosely pressed. Use short-grain rice cooked with slightly less water, shape while the rice is warm, and press firmly enough to hold, but not so hard that the rice turns pasty.
Do you need a mold to make onigiri?
No. Wet hands, a pinch of salt and a bit of practice are enough. Plastic wrap helps beginners shape sticky rice cleanly, and plastic molds give consistent triangles, but they are optional.
Should onigiri be refrigerated?
Cold makes cooked rice hard and dry. For a short trip, a cool bag is better. For longer storage, wrap each onigiri tightly, refrigerate and warm it briefly in a microwave so the rice softens again.
Why is the nori wrapped at the bottom only?
Nori is wrapped around the base so you can hold the onigiri without touching the rice. It also keeps the seaweed separate from the moist rice until you eat, which keeps the nori crisper.
Can you use sushi rice for onigiri?
Yes, plain short-grain Japanese rice is ideal. Sushi rice seasoned with vinegar tastes different and is used for sushi, so for a traditional onigiri, use plain cooked rice with salt only.
For the address, opening hours and menu, see Minnano Japanese Grocery in San Antonio.
This article is general information from an independent guide, not from Minnano Japanese Grocery itself. For the store’s current details see hours and location.