A bowl of Toyohashi curry udon: thick yellow curry broth with fried tofu and pork, topped with boiled quail eggs and scallion, with a layer of tororo rice hidden beneath the broth
Serves1 serving
CuisineJapanese

Toyohashi Curry Udon: Aichi Curry Noodles over Tororo Rice

Toyohashi curry udon from Aichi, Japan, hides rice and grated yam under curry noodles. Learn the toasted roux, the three layers and how to eat it.

Cooking flow

Cooking steps

STEP 11 / 7

Toast the curry powder and flour

Curry powder and flour toasting in a frying pan
Stop at a faint reddish-brown tint; darker than this and the roux turns bitter

Put the curry powder and wheat flour into a dry frying pan. Toast them lightly, stirring the whole time and keeping the heat gentle so nothing scorches. The raw, floury smell fades and the curry aroma comes up warm and toasty. Take the pan off the heat when the powder smells cooked and its color has only just begun to deepen.

STEP 22 / 7

Loosen the roux with chilled dashi

Chilled dashi whisked into the curry roux paste
Whisk across the bottom of the pan as the dashi goes in; the liquid should turn glossy, not speckled

Pour the chilled dashi into the toasted powder a little at a time. Stir each splash in fully before adding the next, pressing the paste against the bottom of the pan. Cold liquid lets the flour disperse before it can swell into lumps. Keep going until all the chilled dashi is in and you have a smooth, glossy beige liquid with no lumps.

Cold dashi, small splashes

This step decides the texture of the whole bowl. If you pour all the dashi in at once, the flour clumps and stays gritty however long the broth simmers. The first few splashes should make a thick paste, and only after that should it loosen into a liquid.

STEP 33 / 7

Cut the fillings

Fried tofu and pork cut on a board
Blanched abura-age cut into quarters and pork in bite-size pieces, grouped and ready for the pot

Remove the excess oil from the abura-age, then cut the half sheet into 4 pieces. Cut the pork into bite-size pieces. Cut the ½ stalk of scallion on the diagonal into 2-inch (5 cm) lengths for the broth, and slice some scallion into thin rings for garnish. Set each filling in its own pile next to the stove.

STEP 44 / 7

Simmer the broth and cook the pork

Pork added to the simmering dashi broth while the foam is skimmed
Lower the pork in only once the broth is boiling, then skim straight away while the foam is still gathered

Put the remaining dashi, abura-age, mirin and soy sauce into a saucepan and bring it to a boil. Add the pork and skim off the grey foam as it rises. When the pork has changed color all the way through and no pink remains, turn the heat down to low. The broth should be clear of foam and barely moving.

STEP 55 / 7

Add the roux, thicken, finish with scallion

Amber curry broth with diagonal-cut scallion stirred in
Fold the scallion in briefly so it stays bright green against the amber broth

Stir the curry roux well, since the flour settles, and pour it into the pot. Add the potato starch slurry a little at a time, stirring after each addition, until the broth is as thick as you like it. Add the diagonal scallion and stir just enough to mix it in. The broth is ready when it is glossy and coats the back of a spoon.

Thicken in stages

Re-stir the slurry before each addition, because the starch sinks to the bottom of the cup within seconds. Give each addition a moment over the heat before judging the thickness. The broth needs body here because it has to sit on top of the noodles and not run straight down into the bowl.

STEP 66 / 7

Build the base: rice, tororo, udon

Rice, tororo and udon layered in a deep bowl
Seen from above before the curry goes in: rice at the bottom, a pale tororo sheet, then the noodles

Grate the yam now so the tororo goes into the bowl fresh and sticky. Spread the rice over the bottom of the deep bowl. Pour the tororo over it so the rice is covered edge to edge. Pile the warmed udon on top. Stop when no rice shows through the tororo and the noodles sit in a mound above it.

Raw tororo

The tororo is eaten raw and is never cooked. Use a fresh yam, keep it refrigerated until you grate it, and use grated tororo the same day. Grate with clean utensils kept apart from raw meat. Anyone pregnant, elderly, very young or with a weakened immune system may prefer to leave the raw tororo out.

STEP 77 / 7

Pour the curry and top with quail eggs

Curry broth poured over udon and topped with quail eggs
Steam rising as the curry closes over the noodles; serve straight away while the layers are still separate

Pour the hot curry broth over the noodles, letting it settle around them. Place the 3 boiled quail eggs on top. Put the fukujinzuke in a small dish on the side. The bowl is done when the curry covers the noodles and the rice and tororo underneath are completely hidden.

Pour over the noodles, not the edge

Aim the broth at the mound of udon so it runs down through the noodles. Pouring down the side of the bowl breaks the tororo sheet and lets curry into the rice before anyone has picked up their chopsticks.

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Ingredients

Ingredients

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Ingredients

Ingredient Amount Role
Udon noodles 1 portion The top layer; warmed before it goes into the bowl
Bonito and kelp dashi (katsuo-kombu dashi), chilled ¾ cup + 1 tbsp (200 ml) Loosens the homemade roux into a smooth liquid
Bonito and kelp dashi (katsuo-kombu dashi) ¾ cup + 1 tbsp (200 ml) The base of the curry broth
Mirin 2 tbsp (30 ml) Rounded sweetness in the broth
Soy sauce 2 tbsp (30 ml) The savory backbone of the broth
Curry powder 2 tbsp Aroma for the homemade roux
Wheat flour (komugiko) 4 tbsp Body for the homemade roux
Curry roux (karē rū) 2 oz (60 g) Curry depth and thickness in the broth
Thinly sliced pork (butakoma) 1½ oz (40 g) Meat and richness in the broth
Potato starch slurry (mizutoki katakuriko) as needed Final thickening
Boiled quail eggs 3 Topping
Cooked rice 2 oz (60 g) Bottom layer
Grated raw yam (tororo) 2 oz (60 g) The sheet that keeps the curry off the rice
Fried tofu pouch (abura-age) ½ sheet Soaks up the broth
Scallion, cut on the diagonal into 2-inch (5 cm) lengths ½ stalk Stirred into the broth
Scallion, thinly sliced as needed Fresh green garnish
Fukujinzuke (red pickled vegetables) as needed Served on the side
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The bowl comes to the table thick and glossy, a deep amber-yellow. Three small quail eggs and some green scallion sit on top, and pieces of pork and fried tofu show just under the surface. You eat the udon from the top down and leave the bottom of the bowl alone. When the noodles run out, your spoon finds something soft under the curry: white rice under a pale sheet of grated raw yam, ready for the curry left in the bowl. This is Toyohashi curry udon, from the city of Toyohashi in Aichi Prefecture. The broth tastes as much of bonito-and-kelp dashi, mirin and soy as of curry, the heat is gentle, and the bowl is built so you eat it twice.

One Bowl, Two Meals: How Toyohashi Built Its Curry Udon

Toyohashi's udon shops make all of their own noodles. Their curry udon had one problem that every curry udon has: the thick curry sauce tends to get left in the bowl after the noodles are gone. The answer was to put something in the bottom of the bowl so the last of the curry gets eaten too. The dish was created as a new food for "udon town Toyohashi" and went on sale in April 2010. It reached one million servings in 4 years and 11 months.

The idea behind the layers is easy to follow at the table. Leftover curry makes you want to stir in rice and turn it into a rice porridge. If rice and udon mix in the bowl, though, both suffer. So the rice is covered with grated mountain yam, laid over it like a sheet. While you eat the noodles, the tororo keeps the curry away from the rice. Once the noodles are gone, the same tororo ties the curry and rice together, and one bowl gives you two different meals.

A small dish of red fukujinzuke beside peeled boiled quail eggs
Bright red fukujinzuke and peeled quail eggs, the two small things every bowl in Toyohashi carries with it

Only shops inside Toyohashi city may sell a bowl under this name. A shop has to belong to the city's noodle-makers' union and also to Team Karei, the group of shops that serve the dish. Every bowl they serve follows five rules, and two of them tie it to the city itself. Toyohashi raises more quail than anywhere else in Japan, so quail eggs are one of its local specialties. The red pickles on the side are the same kind of relish that sits next to Japanese curry rice.

The five rules of a Toyohashi curry udon
  1. The noodles are made in-house.
  2. From the bottom of the bowl up, it goes rice, tororo, then curry udon.
  3. The eggs are Toyohashi quail eggs.
  4. It comes with fukujinzuke, or with tsubozuke pickles or red pickled ginger.
  5. It is made with love.

A home kitchen can keep the layers, the pickles and the love. Homemade noodles and quail eggs from Toyohashi are what make a bowl in the city the real thing.

Every shop pours its own curry

Outside the five rules, each shop does what it likes, so no two bowls in town are the same. At Tamagawa Udon the curry is thick and heavy. Nazare Udon builds its curry on a pork-bone and chicken-bone stock. Tokachian serves a white curry topped with espuma foam. The fillings change from shop to shop as well. The bowl here sits closer to the classic Japanese noodle shop. It uses a dashi broth seasoned with mirin and soy, a curry base of toasted curry powder and flour, and a little pork and fried tofu. If you are working through the regional dishes on our Japan page, this one pairs naturally with a noodle bowl such as tonkotsu ramen.


Ingredients (serves 1)

Ingredients for Toyohashi curry udon laid out on a counter
Sliced pork, fried tofu, quail eggs, scallions, curry powder, flour, potato starch, bonito-kelp dashi, rice, a whole nagaimo for the tororo, and udon
Allergen information

This bowl contains wheat (flour, udon, curry roux), egg (quail eggs), pork, and soy (abura-age, soy sauce). Bonito dashi contains fish. Check the labels on curry powder, curry roux, dashi products and pickles. Peeling and grating raw yam can make your hands itch, so wear gloves or hold the yam in a paper towel if your skin is sensitive.

Equipment

  • Frying pan, for toasting the roux
  • Whisk or wooden spatula
  • Small saucepan, for the broth
  • Fine sieve, for rescuing a lumpy roux
  • Grater (or a suribachi mortar) for the tororo
  • Cutting board and knife
  • Deep, sturdy donburi bowl

Choosing and Substituting

The deep bowl matters more than anything you buy. The rice and tororo have to stay hidden under the noodles and curry, and a shallow bowl lets the layers show and run together. Everything else comes down to a few items from a Japanese or Asian grocer.

  • Yam for the tororo: yamaimo or nagaimo, grated raw. Nagaimo is easier to find abroad and grates into a looser, more watery tororo. Yamaimo grates thicker and holds a firmer sheet over the rice.
  • Dashi: bonito and kelp dashi from a dashi pack, granules or your own stock all work. Granules are the quickest, but they taste saltier, so add the soy a little at a time.
  • Quail eggs: canned or vacuum-packed boiled quail eggs save a step.
  • Udon: frozen, pre-boiled and fresh udon all sit well in the bowl. Frozen udon keeps the most bite.
  • Pickles: fukujinzuke is the usual choice. Tsubozuke pickles or red pickled ginger are also correct by the five rules and give a sharper, saltier contrast.
  • Thickener: katakuriko is potato starch. Cornstarch can stand in, but it is not the same product as katakuriko, so add the slurry in small amounts and judge by thickness.

Method

The roux comes first, in a dry frying pan, while nothing else is on the stove. Cut the fillings next, then build the broth in a saucepan. Grate the tororo and warm the udon just before you assemble the bowl, so the yam stays thick and the noodles go in hot. The bowl is put together at the very end, and the curry goes on last.

When It Goes Wrong

What you see Why What to do
Lumps in the roux The dashi went in too fast or was not chilled Push the liquid through a fine sieve, pressing the lumps through, and add it to the broth
The roux smells sharp and bitter The powder scorched during toasting Start the roux again over gentler heat; the bitterness carries into the whole bowl
The broth is thin and runs off the noodles Not enough slurry yet Re-stir the slurry and add it a little at a time until the broth coats a spoon
Curry has soaked into the rice The tororo sheet broke, or someone mixed from the bottom Grate the tororo just before assembly, cover the rice fully, pour the broth over the noodles, and eat from the top down

Serving and Eating

A half-eaten bowl with tororo rice being folded into the remaining curry
The second meal: once the noodles are gone, fold the tororo rice into the curry left in the bowl

Eat it in order. Start with the curry udon on top, just as it comes, and do not push your chopsticks down to the bottom to mix. Once the noodles are gone, the tororo rice comes up from underneath. Fold it into the remaining curry for a second, different bowl: softer and rounder, with the sticky yam holding the rice and curry together. Partway through, add fukujinzuke from the side dish to change the flavor. Its crunch and sweet-salty bite cut through the thick curry.

The bowl is a full meal for one, and it is best eaten the moment it is ready, while the curry is hot and the layers are still separate. In Toyohashi you can eat one at shops across the city, including at the station building just outside the ticket gates.

Frequently Asked Questions

Is Toyohashi curry udon spicy?

No, the heat is gentle. The broth is built on dashi, mirin and soy, so it tastes like a Japanese noodle-shop broth with curry folded into it more than like a hot curry. Fukujinzuke or red pickled ginger on the side adds sharpness.

Can I leave out the tororo?

You can, but then you have curry udon with rice under it. The rice soaks up curry from the start and turns soft before you reach it. The tororo sheet is what keeps the two meals apart and then joins them in the second half.

Does the rice need to be hot?

Warm rice works best, because the curry goes on last and nothing in the bowl is heated again. Freshly cooked or reheated rice and warmed udon keep the whole bowl hot down to the bottom layer.

How do I eat it with chopsticks and a spoon?

Use chopsticks for the noodles, pork and fried tofu on top, and pick up the spoon when the rice appears. The spoon is the easiest way to scoop the tororo rice through the curry left in the bowl.

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