Sanuki Udon: Kagawa's Beloved Noodle Trail

Explore Sanuki udon in Kagawa, Japan's Udon Prefecture, with its chewy noodles, self-service shops, serving styles and tips for a tasty noodle trail.

Published October 18, 2026 at 5:35 AM JST | By Tokyo Paul

Quick answer: Sanuki udon is the chewy, square-edged wheat noodle of Kagawa Prefecture on Shikoku, usually served in a light broth made from dried sardines. Kagawa is nicknamed Udon Prefecture, and visitors enjoy its quick self-service shops around Takamatsu and Kotohira.

What Is Sanuki Udon?

Sanuki udon is the signature noodle of Kagawa Prefecture on the island of Shikoku, and it is one of the most beloved regional foods in Japan. Udon itself is a thick noodle made from wheat flour, and it appears across the country in many forms. The Sanuki style is the one that people travel for: square-edged noodles with a firm, springy, chewy bite, served in a clear and gentle broth. Sanuki is the old name of the province that became Kagawa, which is why the name still appears on shop signs, often written in hiragana (the rounded Japanese syllable script) as さぬき.

Kagawa is Japan's smallest prefecture by area, but it has a huge reputation for noodles. A well-known tourism campaign launched in 2011 even rebranded it as "Udon-ken," or Udon Prefecture, and the prefecture's travel website still plays on that nickname. Reports from travel writers say that Kagawa has around seven hundred udon shops, which means that a hungry visitor is never far from a bowl.

This guide explains why the region became an udon heartland, how the bowls are served, how the famous self-service shops work, and how to plan a noodle trail that mixes eating with sightseeing around Takamatsu and the shrine town of Kotohira.

Why Is Kagawa So Famous for Udon?

Kagawa is famous for udon because the old Sanuki region had everything that noodle makers need close at hand. The area has long hours of sunshine, and its flat farmland was well suited to growing wheat. The region has been a notable grain-producing area since the Nara period. Local salt, local soy sauce and dried baby sardines (known as iriko or niboshi) were also easy to get, and these are the essential ingredients for dough and broth.

Over time, wheat flour, salt and water became the basis of a local specialty, and the noodles gained fame well beyond the island. Today Kagawa produces a large share of Japan's udon. The tradition is deeply local, and many residents can name a favorite shop in their own neighborhood.

The result is a food culture built on simplicity. Good Sanuki udon needs only noodles, hot or cold broth and a few toppings. The skill lies in the dough, which is kneaded, rested and cut carefully so that each strand is thick and chewy yet tender.

How Is a Bowl of Sanuki Udon Served?

Sanuki udon is served in several classic ways, and learning the names helps you order with confidence. Kake udon is the simplest: noodles in hot broth, usually topped with chopped green onion. Zaru or cold udon is served on a bamboo tray or in a bowl with a dipping sauce, which highlights the firmness of the noodles. Kamaage means the noodles are lifted straight from the boiling pot into a bowl of the hot cooking water, and are then dipped into a warm sauce. Bukkake udon has cold noodles with broth poured over them.

Toppings add variety. Common choices include grated ginger, green onion, tempura crumbs, an egg (soft-boiled or raw), and fried items such as vegetable tempura. Many shops also offer deep-fried fish cake and croquettes. The broth in Kagawa is typically made from iriko, the tiny dried sardines, and has a clean, savory flavor.

If you avoid fish, ask staff about the broth, since traditional Sanuki shops almost always use fish-based stock.

How Do Self-Service Udon Shops Work?

Self-service udon shops, called "serufu" in Japanese, are a highlight of the Kagawa experience, and they are easier than they look. The usual flow is that you pick up a tray and tell the staff the size of your portion and whether you want hot or cold noodles. They hand you a bowl, and you slide along the counter, where you add toppings such as tempura, fish cake or croquettes. Condiments such as ginger and green onions are often set out nearby, and you pay before you sit down.

The self-service style is fast, friendly and inexpensive. The seating can be casual, with benches or simple tables, and the atmosphere is relaxed.

Shops can be small and sometimes hard to spot, and many are family-run noodle factories that sell out of the day's dough and close early. As a general rule, aim for earlier in the day, and check the shop's closing time before you go.

Where To Go and What To Know Before You Visit

A natural base is Takamatsu, the prefectural capital and largest city. It has a high concentration of noodle shops, and you can combine them with sightseeing in Ritsurin Garden, a large traditional landscape garden. Many visitors plan a trail that uses local trains or a rental car to reach shops in smaller towns, because the most famous bowls are often in places far from the main streets.

Kotohira is another popular stop. This town is home to Kotohira-gu, often called Konpira-san, a Shinto shrine on Mount Zozu that is traditionally revered by sailors and fishermen. The walk from town to the main shrine is 785 steps, and another 583 steps lead to the inner shrine, for a total of 1,368. Noodle shops cluster near the approach, since pilgrims have long stopped for a bowl before or after the climb. A light bowl before the stairs and a larger one afterward is a popular rhythm.

Art lovers can combine udon with island hopping. Naoshima, a small island known for its art museums, and Shodoshima, the second-largest island in the Seto Inland Sea, are both part of Kagawa. A day at the museums or among the olive trees pairs well with a noodle lunch on the mainland.

As of autumn 2026, opening hours, prices and holidays vary by shop, so check each shop's current details before you travel. Many udon shops open early and some close by mid-afternoon, so eating lunch earlier or later than the noon rush avoids the biggest queues.

Etiquette is relaxed. Slurping is normal and even helps cool the noodles, and there is no single correct way to eat them. Take only the toppings you will finish, and follow any posted instructions about returning your tray. Be considerate in residential neighborhoods, where small shops may sit on ordinary streets.

Pace yourself. Udon bowls are filling, and many enthusiasts visit more than one shop in a day. Ask for a small portion if you plan to visit several shops, and drink water or tea between stops.

Quick Takeaways

Sanuki udon is the noodle of Kagawa, made with local wheat, salt and water and served with a clear fish-based broth. Its chewy, square-edged noodles, simple toppings and fast self-service shops make it an easy and rewarding food adventure. Start in Takamatsu, add a stop in Kotohira, and let your appetite guide the rest.

Whichever shop you choose, take your time with the first bite. The beauty of Sanuki udon is that something so humble can taste so satisfying, and it is no wonder that a whole prefecture is proud to be called Udon Prefecture.

Frequently Asked Questions

Why is Kagawa called Udon Prefecture?

Kagawa is the home of Sanuki udon and has hundreds of noodle shops. A tourism campaign launched in 2011 officially promoted the nickname Udon-ken, meaning Udon Prefecture, to celebrate the local noodle culture and invite travelers to explore it.

How do self-service udon shops work?

You choose your portion size and hot or cold noodles at the counter, then slide along to add toppings such as tempura or fish cake. Condiments like ginger and green onion are often set out for you, and you generally pay before sitting down.

What is Sanuki udon broth made from?

Traditional Sanuki udon broth is made from iriko or niboshi, which are dried baby sardines, often with soy sauce for seasoning. Because the stock is fish-based, travelers who avoid fish should ask the shop about the broth before ordering.