How is kishimen different from udon?

Kishimen is thinner and wider (about 1 mm by 7–8 mm) and soaks up broth more readily, so the soup is often seasoned a bit stronger than round udon.

Why make the broth strong?

Flat noodles absorb seasoning quickly; a mild broth tastes watery by the time you eat.

White kamaboko or ordinary fish cake works; the red board mainly adds Nagoya color.

Kishimen (Nagoya Flat Noodles)

Name: Kishimen (Nagoya Flat Noodles)
Prep time: 15 min
Cook time: 25 min
Total time: 40 min
Yield: 2人分
Cuisine: Japanese
Ingredients: Cooked kishimen noodles 2 portions; Spinach 50g; Red kamaboko (fish cake) 40g; Aburaage (fried tofu pouch) 1 sheet; Negi (Japanese leek) as needed; [A] Soy sauce 1 tsp; [A] Sugar 1/2 tsp; [A] Dashi 50 ml; [B] Dashi 800 ml; [B] Soy sauce 1 Tbsp; [B] Mirin 1/2 Tbsp; [B] Salt 1/2 tsp; Katsuobushi (bonito flakes) 6g

By Chef Cannon

Cuisine: Japanese

Region: 愛知県

Servings: 2人分

At a glance

Time: about 25 min · Serves about 2 · Difficulty: easy · ≈ 480 kcal per bowl

Kishimen (Nagoya Flat Noodles), also known as Aichi flat udon-style noodles, is the prefecture’s everyday bowl: strands about 1 mm thick and 7–8 mm wide in soy-seasoned dashi, topped with spinach, red kamaboko, sweet-salty aburaage, negi and katsuobushi. They drink up broth faster than round udon, so season a little boldly; cooked or dried noodles make a quick Nagoya-style lunch at home.

Ingredients

Cooked kishimen noodles 2 portions
Spinach 50g
Red kamaboko (fish cake) 40g
Aburaage (fried tofu pouch) 1 sheet
Negi (Japanese leek) as needed
[A] Soy sauce 1 tsp
[A] Sugar 1/2 tsp
[A] Dashi 50 ml
[B] Dashi 800 ml
[B] Soy sauce 1 Tbsp
[B] Mirin 1/2 Tbsp
[B] Salt 1/2 tsp
Katsuobushi (bonito flakes) 6g

Steps

Blanch the spinach briefly in salted boiling water, shock in cold water to set the color, squeeze dry thoroughly, and cut into 3 cm lengths. Slice the kamaboko into thin half-moons. Thinly slice the negi into rings.
Pour hot water over the aburaage to degrease, then cut into short strips. In a small pot bring [A] soy sauce, sugar, and dashi to a boil, add the aburaage, and simmer until the liquid is nearly gone and the strips are lightly glazed.
In another pot heat [B] dashi, soy sauce, mirin, and salt and adjust the seasoning. Flat noodles soak up broth quickly, so finish the soup a touch on the strong side.
When the broth boils, add the cooked kishimen and simmer gently 1–2 minutes until the strands loosen and warm through. Do not overcook or the noodles will go soft and stretchy.
Ladle noodles and broth into bowls, arrange spinach, kamaboko, and the simmered aburaage neatly, scatter negi and katsuobushi, and serve at once.

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Notes

Kishimen is thinner and flatter than udon, so a boldly seasoned broth suits it. Katsuobushi-and-kombu dashi with soy sauce alone is plenty tasty at home.

Nagoya-style red board kamaboko gives local character; white kamaboko is fine too.

The noodles cook fast—do not leave them long in the soup. For frozen or dried noodles, boil per the package, then warm them through in hot broth.

Sweet-salty simmered aburaage adds a gentle sweetness that loves the noodles. Chicken simmered the same way makes a “chikara kishimen” style topping.

In summer, chill both noodles and broth for a refreshing “koro” style bowl.

Time and temperature

Blanch spinach: seconds in boiling water · Simmer aburaage: 3–5 min until glazed · Noodles in broth: 1–2 min to heat through

Nutrition

480 kcal · Protein 18 g · Fat 10 g · Carbs 80 g

1 bowl (half of 2 noodle portions plus toppings), estimate

Substitutes

Red kamaboko → white kamaboko or fish cake
Cooked kishimen → dried/frozen noodles boiled per package
Spinach → komatsuna or greens
Aburaage → thick fried tofu strips
Katsuobushi dashi → kombu dashi (vegetarian)

Storage

Keep noodles and broth separate when possible. Broth keeps 1–2 days sealed in the fridge; noodles soften if left soaking. Reheat by warming noodles briefly in hot broth—do not boil long.

FAQ

How is kishimen different from udon?: Kishimen is thinner and wider (about 1 mm by 7–8 mm) and soaks up broth more readily, so the soup is often seasoned a bit stronger than round udon.
Why make the broth strong?: Flat noodles absorb seasoning quickly; a mild broth tastes watery by the time you eat.
No red kamaboko?: White kamaboko or ordinary fish cake works; the red board mainly adds Nagoya color.
How do you serve it in summer?: Chill both noodles and broth for a refreshing “koro” style bowl.

Origin and history

Kishimen is Aichi’s signature noodle dish: flat strands about 1 mm thick and 7–8 mm wide served in a soy-seasoned dashi broth. It is everyday comfort across the prefecture and even shows up in school lunches—true soul food.

Roots are often traced to flat-beaten udon (himokawa) once eaten around today’s Kariya, and one etymology links the name to Chinese “goishi-men” sweets. Flat noodles drink up broth easily, matching a local taste for assertive seasoning—one reason the dish spread.

At home, cooked or dried noodles topped with spinach, red kamaboko, aburaage, negi, and katsuobushi are the classic set. Old shops may use a rich horse-mackerel and tamari broth, but katsuobushi dashi and soy still make a convincingly Nagoya bowl.