Udon is one of Japan's most democratic foods. A bowl of kake udon — plain broth, thick white noodles — costs ¥300–¥500 at a chain restaurant, takes three minutes to prepare, and can be eaten standing up at a counter between train connections. Yet the same noodle, in a different region with a different broth, becomes a point of fierce local pride and a destination in itself.
This guide covers the main types of udon dishes, the most important regional varieties, and how to order at both chain restaurants and specialty shops without guessing.
1. What Udon Actually Is
Udon (うどん) is a thick wheat flour noodle — typically 4–6mm wide, white, and soft with a chewy texture. The noodle itself has a mild flavor designed to absorb the broth it is served in. What varies dramatically across Japan is the broth (dashi base, saltiness, color), the toppings, and the noodle texture from region to region.
The two main broth styles reflect Japan's regional cooking divide:
- East Japan (Kanto / Tokyo): Darker, saltier broth. The dashi base is usually a combination of katsuobushi (bonito flakes) and soy sauce, which gives the soup a deep brown color.
- West Japan (Kansai / Osaka / Kyoto): Lighter, more delicate broth. Kombu seaweed dashi with lighter soy sauce produces a pale golden broth with a gentler saltiness.
2. Main Types of Udon Dishes
The simplest form: noodles in hot broth, usually topped with green onions and fish cake (naruto). No extras. This is the baseline — ordering it tells you what the broth tastes like before toppings change the flavor. ¥300–¥500 at chains.
Kake udon with tempura on top — usually shrimp (ebi), and sometimes vegetable pieces. The most popular udon dish for tourists. The tempura gradually softens in the broth as you eat. Order it immediately after it arrives. ¥600–¥900.
"Moon-viewing udon" — kake udon with a raw egg broken on top. The egg slowly cooks in the hot broth as you eat. The yolk is the "moon." Stir it gently as you eat for a richer broth. ¥400–¥600.
Udon with sweetened deep-fried tofu (aburaage) on top. The tofu is braised in a sweet soy mixture and is the definitive Osaka udon topping — Kitsune udon originated in Osaka. The broth-soaked tofu is particularly rich and satisfying. ¥400–¥700.
Cold udon served on a bamboo tray (zaru) with a dipping sauce on the side. Summer dish. The noodles are chilled and you dip them briefly into the tsuyu before eating. Good if you want to taste the noodle texture clearly, unmodified by broth. ¥500–¥800.
Freshly boiled udon mixed immediately with raw egg and soy sauce — no broth. The hot noodle cooks the egg slightly as you toss it. Popular at Sanuki udon specialty shops. The texture is silky and rich. ¥400–¥700.
3. Regional Udon Varieties Worth Seeking Out
| Regional Style | Origin | Characteristics |
|---|---|---|
| Sanuki Udon (讃岐うどん) | Kagawa Prefecture (Shikoku) | Japan's most famous udon. Thick, firm, extremely chewy noodles. Strong dashi broth. Kagawa has more udon shops per capita than any prefecture — visiting is called "udon pilgrimage" (udon junrei). Must-eat if visiting Shikoku. |
| Inaniwa Udon (稲庭うどん) | Akita Prefecture (Tohoku) | Thinner, flatter, and smoother than standard udon — closer to a flat noodle. Pale yellowish color. Delicate flavor. Usually served cold in summer. One of Japan's three famous noodle types alongside soba and somen. |
| Mizusawa Udon (水沢うどん) | Gunma Prefecture | Slightly thinner than standard udon but still chewy and white. A transparent, simple dipping broth is standard. Often served as a set with sesame sauce as an alternative dipping option. |
| Kishimen (きしめん) | Nagoya (Aichi Prefecture) | Wide, flat udon — more like a ribbon than a round noodle. Softer texture than Sanuki. Nagoya's local variety; often available at Nagoya Station restaurants. |
| Nikomi Udon (煮込みうどん) | Nagoya area | Udon simmered directly in a clay pot (donabe) with chicken, vegetables, and a rich miso-based broth. A winter dish; the pot arrives still bubbling. Strong flavor — very different from standard udon. |
4. How to Order at a Chain Restaurant
Chain restaurants like Hanamaru Udon and Marugame Seimen are the easiest udon experience for tourists. They use a cafeteria-style ordering system:
FAQ
No. Udon is made from wheat flour. It is not suitable for people with celiac disease or gluten intolerance. Rice noodles or rice-based dishes are the better alternative. Soba noodles are made from buckwheat but are often mixed with wheat — check before ordering.
The noodles themselves are vegan, but the broth is almost always made from fish stock (katsuobushi/bonito). Kombu-only dashi is available at some restaurants and in Kyoto vegetarian cuisine (shojin ryori), but it is not the default. Ask: "Dashi wa nani de tsukutte imasu ka?" (What is the dashi made from?) to check before ordering.
Different noodles, different broths. Udon noodles are thick, white, wheat-based. Ramen noodles are thinner, often yellow (alkaline water makes them yellow), and more varied in texture. Ramen broths are generally richer and more complex (tonkotsu, shoyu, miso) while udon broth is typically cleaner and more delicate.
Kagawa Prefecture (Sanuki udon) is the answer most Japanese people give. The prefecture has hundreds of udon shops, many of which are tiny family operations only open for a few hours in the morning. A day trip from Osaka to Takamatsu (Kagawa's capital) specifically to eat udon is a recognized tourist activity.