Sumeshi: Japanese Sushi Rice with Rice Vinegar and Kombu

Glossy sushi rice turned out into a wooden hangiri, with a rice paddle resting on top
Serves
3 to 4 servings
Level
Beginner
Cuisine
Japanese

Sumeshi is the vinegared rice of Japanese sushi. The 2-go rice vinegar mix, the cutting stroke that keeps grains apart, fanning for gloss and safe holding.

Cooking flow

Cooking steps

STEP 11 / 7

Rinse the rice

Hands rinsing rice in a bowl as cloudy water runs off
Move the grains with relaxed fingers; pressing hard cracks them

Put the rice in a large bowl and cover it with cold water. Stir gently with your fingertips, more of a swirl than a scrub, so the grains stay whole. Pour off the cloudy water and repeat with fresh water. Stop when the rinse water is clearly lighter than the first milky bowl.

STEP 22 / 7

Drain in a sieve

Rinsed rice draining in a sieve, with the last drops falling
Damp but not wet: the grains look moist with no puddles in the mesh

Tip the rice into a fine-mesh sieve set over a bowl. Leave it for 30 minutes to 1 hour. Draining means the 2-go water measure is close to all the water the rice cooks in. Skip it, and extra water clinging to the grains makes the finished rice sticky. The rice is ready when the drips have stopped and no water stands among the grains.

Give draining its full time

Most sticky sumeshi starts here. The cooker cannot tell your measured water from the water left on the rice, so drain the rice fully before you measure the water.

STEP 33 / 7

Cook with kombu on the normal setting

Rice, water and kombu in the inner pot of a rice cooker
Lay the kombu flat on the rice before you close the lid

Put the drained rice in the rice cooker's inner pot and add 2 go of water. Wipe the kombu lightly with a damp cloth, without rinsing it, and lay it on top. Cook on the normal setting. Your cooker decides how long it takes. Leave it alone until it signals done.

STEP 44 / 7

Mix the seasoned vinegar

Rice vinegar, sugar and salt stirred together in a small jug
Clear to the bottom means fully dissolved

While the rice cooks, put the rice vinegar, sugar and salt in a small bowl or jug. Stir until the sugar and salt have fully dissolved. Keep it near where you will turn out the rice. Hold the jug up to the light: it should be clear all the way to the bottom, with no white layer or grit.

STEP 55 / 7

Turn out the rice and pour the vinegar

Hot rice turned into a bowl as seasoned vinegar is poured over in a circle
Pour while the rice is steaming; hot rice takes in the vinegar

When the rice is done, lift out the kombu and set it aside. Turn the hot rice into the wide bowl or hangiri right away and spread it loosely. Pour the vinegar mix over it in a circle so it reaches the whole surface, not one spot. Leave it for 1 minute so the vinegar can work in.

STEP 66 / 7

Cut through the rice and fan it

Cutting through sushi rice with a paddle while fanning with an uchiwa
Slice and lift with the edge of the paddle; never flatten the rice

Hold the paddle on its edge and slice through the rice in cutting strokes, turning it over from the bottom as you go. Fan with your other hand the whole time so steam is driven off. Cutting keeps the rice from turning sticky, while pressing or stirring in circles crushes the grains into paste. Stop when every grain shines and the rice has lost its first heat, warm to the touch but no longer hot.

Cut, don't stir

Think of the paddle as a blade, not a spoon. Short slicing strokes and steady fanning give separate, glossy grains. Each round stir smears starch between them.

STEP 77 / 7

Cover with a damp cloth until you use it

Glossy, cooled sushi rice with a wrung-out damp cloth laid over half the tub
Damp, not dripping: a wet cloth makes the surface soggy

Wet a clean cotton cloth with water and wring it out hard. Lay it over the rice, with the paddle beside the tub. The cloth stops the surface from drying while you get fillings or toppings ready. Use the rice soon. The surface under the cloth should stay moist and shiny, with no hard crust.

0 / 0
Ingredients

Ingredients

1 / 1

Ingredients

Ingredient Amount Role
Japanese short-grain white rice (kome) 2 go (2 rice-cooker cups) The body of the dish
Water 2 go (2 rice-cooker cups) Cooking water
Dried kombu kelp (konbu) a 2-inch (5 cm) piece Gives the rice a gentle savoury depth as it cooks
Rice vinegar (komezu) 4 tbsp Sourness, the main flavour of the seasoning
Sugar 2 tbsp Sweetness and shine
Salt 1 tsp Sharpens the outline of the flavour
0 / 0

The rice cooker clicks off and you lift out the kombu. Then the hot rice goes into a wide bowl, and steam rolls up off it. You pour the seasoned vinegar over it in a slow circle, and for a moment the kitchen smells sharp and clean. Then the paddle starts cutting through the rice while the fan moves in your other hand, and the grains begin to shine. Sumeshi is Japanese rice seasoned with rice vinegar, sugar and salt, and it sits under nigiri, rolls, chirashi, inari pockets and hand rolls. Good sumeshi is tart first, lightly sweet, with salt at the edge, and each grain stays separate and glossy instead of clumping into paste.

A Bowl of Rice That Became the Base of Sushi

Sumeshi has carried different weight at different times. Nigiri from the Edo period is usually described as having about three times the rice of a piece today. Back then the rice was what filled you, and the topping came second. Nigiri began at street stalls. When sushi makers moved into proper shops, they kept the habit of shaping each piece at a counter in front of the customer. Over time the balance flipped, and today the topping gets the attention while the rice holds it up. The rice still decides whether a piece of sushi works. One long-running Tokyo shop, open since 1879, still seasons its rice with nothing but red vinegar and salt.

The same seasoned rice changes across regions. Around Tokyo, people usually lay toppings such as sashimi over a bed of sumeshi and call it chirashizushi. Around Osaka, the usual style is to chop the fillings small and mix them into the rice, and that dish is called barazushi. In Osaka, leftover barazushi gets steamed the next day and eaten warm as mushizushi, also called nukuzushi. That is one way sushi rice is served warm. Whether toppings go on top or get folded in, every one of these dishes starts with a bowl of rice like this one. You can read more about the wider table in Japan.

The name

Sumeshi (酢飯) means "vinegar rice." It is also called sushi-meshi (すし飯), "sushi rice," and in English it usually goes by sushi rice. The words name the seasoned rice itself, before any fish, egg or vegetable goes near it.

Sumeshi is easiest to understand next to its neighbours. Korean gimbap rice is seasoned with sesame oil and salt and has no vinegar at all. Japanese sumeshi relies on vinegar, sugar and salt, added while the rice is hot and worked in until the grains shine.


Ingredients (serves 3 to 4)

Ingredients for sumeshi laid out: 2 go of rice, water, a 2-inch piece of kombu, rice vinegar, sugar and salt
The seasoning is only three things

The rice and water are both measured in go, the Japanese rice-cooker cup. Use the same cup for both. Mix the three seasonings together before the rice finishes cooking.

Dissolve before you pour

Stir the vinegar, sugar and salt together while the rice is still cooking, until the liquid is clear to the bottom. Undissolved sugar and salt land on the rice in gritty patches. Then you have to keep mixing to spread them, and that extra mixing crushes the grains.

Allergen information

Rice, rice vinegar, sugar, salt and kombu contain none of the major food allergens. Fillings, toppings and bottled sushi vinegar are a different matter. Read the label of each product you add, including any shared-facility statement.

Equipment

  • Rice cooker with its inner pot and rice-cooker cup
  • Large bowl and fine-mesh sieve
  • Small bowl or jug and a small whisk or spoon
  • Measuring spoons (tablespoon and teaspoon)
  • Wide bowl or wooden hangiri (sushi rice tub)
  • Rice paddle (shamoji)
  • Uchiwa fan, or any flat hand fan
  • Clean cotton cloth

Choosing Vinegar, and the Other Proportions You Will Meet

What you need to keep is short. Season the rice with rice vinegar, sugar and salt, add the vinegar while the rice is hot, mix with a cutting stroke so the rice never turns sticky, and fan it until it shines. If you keep those four, the rice tastes like sumeshi anywhere. Rice vinegar is mild and clean with some depth behind it, and it suits sushi well. You can use grain vinegar or pure rice vinegar instead at the same amount, but the character of the sourness changes, so the rice will not taste the same.

Clear rice vinegar and amber red vinegar side by side in small glass bowls
Red vinegar tints the rice a warm beige, while rice vinegar leaves it white

Red vinegar (akazu) is brewed from sake lees and belongs to the Tokyo nigiri tradition. It is a separate recipe from this one, so don't swap it in. The Tokyo red-vinegar rice uses 4 tbsp red vinegar, only ½ tsp sugar and 1 tsp salt for 2 go of rice. The rice is cooked with 2 tbsp sake and a 4- to 6-inch (10–15 cm) piece of kombu, with the water a little below the 2-go line. That rice is darker and much less sweet. Bottled sushi vinegar, sold premixed, saves measuring. Use the amount printed on its label, because each brand has its own sweetness and sourness.

Other proportions in everyday use spread widely:

Version Rice Vinegar Sugar Salt Extra
This recipe 2 go Rice vinegar 4 tbsp 2 tbsp 1 tsp 2-inch (5 cm) kombu, water 2 go
Tokyo red vinegar 2 go Red vinegar 4 tbsp ½ tsp 1 tsp Sake 2 tbsp, 4–6-inch (10–15 cm) kombu, water below the line
Osaka barazushi 3 go Rice vinegar 4 tbsp 3 tbsp 1 tsp Kombu tea ½ tsp
Lighter rice vinegar mix 2 go Rice vinegar 3 tbsp 2–3 tbsp 1 tsp —

Why the sugar ranges from half a teaspoon to three tablespoons is not settled. Pick one row and follow it whole. If you average two rows, you lose any way to tell what went right or wrong.


Method

Rinse the rice first and let it drain. The draining is the main hands-off time. Once the rice is cooking, stir the vinegar mix together. The last part moves quickly: the rice goes into the bowl hot, gets the vinegar and 1 minute to soak it up, then the paddle and fan work together until the rice shines.

When It Goes Wrong

What you see Why What to do
Sticky rice with crushed grains Drained too briefly, mixed too long, or pressed down with the paddle Drain for the full 30 minutes to 1 hour. Use only cutting strokes and stop as soon as the rice shines
Too sour or too sweet Amounts taken from two different versions Make this one exactly as written once. Next time, change only one of the three seasonings
Flat taste, or some patches plain and others sharp Seasoning not dissolved, or vinegar poured in one spot Dissolve the mix completely first. Pour it in a circle over the whole surface of the hot rice
Dry, hard surface Fanned long after the rice turned glossy, or left uncovered Stop fanning once the rice is glossy and no longer hot. Keep it under a wrung-out damp cloth until you use it

Serving, Variations and Storage

At the table

One batch of sumeshi covers several dishes. Lay sashimi or other toppings over it for Tokyo-style chirashizushi. Fold in finely chopped fillings for Osaka-style barazushi. Pack it into fried tofu pockets for inari, or set it out with nori and fillings so everyone rolls their own hand rolls. Keep the rice under its cloth until everything else is ready, then serve it straight away.

Variations

  • Red vinegar rice. Follow the Tokyo row in the table above in full, including the sake and the longer kombu. The rice turns beige and is much less sweet.
  • Bottled sushi vinegar. Use the label amount in place of the three seasonings. It is quicker, but sweetness and sourness depend on the brand.
  • Mixed-in barazushi style. Keep this seasoning and fold chopped fillings through the rice after fanning. The rice and fillings become one dish, and every spoonful tastes the same.
  • Warm steamed sushi. In Osaka, refrigerated leftover barazushi is steamed the next day and eaten warm. The rice softens and the vinegar mellows. Only steam rice that went into the fridge promptly.

Storage

Holding cooked rice safely

Never leave sumeshi sitting at room temperature. Divide what you are not eating into small portions and refrigerate promptly, or hold it at 149°F (65°C) or above, and keep the storage time short. Toxins that bacteria produce in rice left out are not destroyed by heat, so reheating or steaming cannot make that rice safe. Rice balls and sushi are typical sources of staphylococcal food poisoning, because the bacteria live on skin and pass easily to food handled with bare hands. Wash your hands well, and use a clean cloth for covering the rice.

Frequently asked questions

How do I make a smaller batch with 1 go of rice?

Halve everything. For 1 go of rice, use 1 go of water and 2 tbsp rice vinegar, 1 tbsp sugar and ½ tsp salt. Use a smaller piece of kombu as well. The method stays exactly the same, including the 1-minute rest after pouring.

My rice cooker has a sushi-rice water line. Should I use it?

For this recipe, fill to the normal 2-go line and cook on the normal setting. Drained rice plus 2 go of water already gives grains firm enough to take the vinegar. Some regional recipes use the sushi line, and the Tokyo red-vinegar rice is cooked a little below the line. Use those settings only with their own seasonings.

Do I need a wooden hangiri?

A wide bowl works. A wooden hangiri soaks up excess moisture and spreads the rice in a shallow layer, so it cools more evenly and stays less sticky. If you make sushi often, it is worth buying.

Does the vinegar make raw fish safe for hand rolls or nigiri?

No. Vinegar, salt, soy sauce and wasabi do not kill anisakis larvae, which live in fish such as mackerel, horse mackerel, salmon, tuna and squid. Buy fish labelled for raw eating, keep it refrigerated until you serve it, and use a clean knife and board that have not touched other foods. Pregnant people, older adults, small children and anyone with a weakened immune system should avoid raw fish and choose cooked toppings instead. Freezing at −4°F (−20°C) for at least 24 hours kills the larvae, and so does cooking to 158°F (70°C), or 140°F (60°C) for 1 minute.

Sources

  • Kikkoman Corporation, Home Cooking, "すし飯のつくり方" (How to make sushi rice). Rice, water, kombu and seasoning amounts. Rinsing, draining 30 minutes to 1 hour, cooking on the normal setting, mixing the seasoning first, pouring and resting 1 minute, cutting with a paddle while fanning, gloss and cooling as the finish. https://www.kikkoman.co.jp/homecook/basic/rice/sushimeshi.html
  • Ministry of Agriculture, Forestry and Fisheries (Japan), "にぎりずし 東京都" (Nigiri sushi, Tokyo), Our Local Cuisines. Edo-period rice volume, origins at street stalls and counters, the red-vinegar proportion with sake and kombu, removing the kombu after cooking, covering with a wrung-out damp cloth, the 1879 red-vinegar shop. https://www.maff.go.jp/j/keikaku/syokubunka/k_ryouri/search_menu/menu/34_2_tokyo.html
  • Ministry of Agriculture, Forestry and Fisheries (Japan), "ばらずし 大阪府" (Barazushi, Osaka), Our Local Cuisines. Kanto chirashizushi and Kansai barazushi, the 3-go Osaka proportion with kombu tea, the sushi-rice water line, steamed leftover barazushi (mushizushi). https://www.maff.go.jp/j/keikaku/syokubunka/k_ryouri/search_menu/menu/39_3_osaka.html
  • Ministry of Health, Labour and Welfare (Japan), "食事にひそむキケン" (Hidden hazards in meals), Kosei Rodo, August 2024. Bacillus cereus in cooked rice; avoiding room temperature, dividing and refrigerating promptly or holding at 65°C or above, keeping storage short. https://www.mhlw.go.jp/stf/houdou_kouhou/kouhou_shuppan/magazine/202408_004.html
  • Mizkan Group, "米酢" (Rice vinegar), Kurashi Pla-su. 2 go of rice serving 3 to 4, the rice vinegar 3 tbsp proportion, the character of rice vinegar for sushi. https://www.mizkan.co.jp/k-plus/product/komezu/
  • Ministry of Health, Labour and Welfare (Japan), "アニサキスによる食中毒を予防しましょう" (Preventing anisakis food poisoning). Fish that carry anisakis, vinegar, salt, soy sauce and wasabi not killing the larvae, freezing and heating guidance. https://www.mhlw.go.jp/stf/seisakunitsuite/bunya/0000042953.html
  • Osaka Institute of Public Health, "温めなおしても防げません!" (Reheating will not prevent it). Rice balls and sushi as sources of staphylococcal food poisoning, bare-hand handling, heat-stable toxins not broken down by reheating. http://www.iph.osaka.jp/s008/20230816141934.html