Japanese Sanuki Udon Kagawa Prefecture Noodle Culture and Toshikoshi Tradition

Ingredients

• For the dough
• 500 g bread flour or dedicated udon flour (chūrikiko/hakurikiko blend), high-gluten; all-purpose flour is not suitable
• 200 ml cold water
• 15–20 g fine salt, dissolved in the water; yields 3–4% salt concentration in the dough
• For the kake dashi
• 1 litre cold water
• 21 g dried konbu, Kagawa ratio: 70% konbu to 30% katsuobushi
• 9 g katsuobushi, Kagawa ratio: 30% katsuobushi to 70% konbu
• 1 tbsp light soy sauce (usukuchi), to season; preserves pale golden colour
• 1 tsp mirin
• To serve
• 4 eggs, raw, one per bowl — canonical Kagawa accompaniment
• For dusting
• as needed bread flour or udon flour, for rolling and cutting

Method

1. 1
   Dissolve the salt in cold water to achieve a 3–4% salt concentration. Add the salted water to the flour in a steady stream, mixing until a shaggy mass forms. Bring the dough together into a rough ball. The dough will be stiff — this is correct.
2. 2
   Place the dough in a sealed plastic bag. Tread the dough underfoot (fumifumi) for 15 minutes or more, folding and reorienting the mass every few minutes. This is the step on which the dish lives or dies: gluten development through foot treading is what produces the sanuki-boshi — the firm, springy, smooth-surfaced bite that defines Sanuki udon. Under-worked dough breaks rather than stretches. The dough is sufficiently developed when it is smooth, cohesive, and springs back slowly when pressed with a finger.
3. 3
   Rest the dough inside the bag at room temperature for 30 minutes. This allows the gluten to relax sufficiently for rolling. The surface of the dough should feel smooth and pliable, not tight.
4. 4
   On a lightly floured surface, roll the dough to a uniform thickness of approximately 3–4 mm. Dust generously with flour, fold the sheet, and cut into noodles of 3–4 mm width. Shake off excess flour. A correctly cut noodle is straight, even, and holds its edges without sticking.
5. 5
   Bring a large pot of unsalted water to a full rolling boil. Add the noodles and cook for 8–10 minutes. Check at 8 minutes: bite through a single noodle — the target is a firm, elastic al dente. A white core should still be faintly visible at the cut face. Do not allow the noodles to soften beyond this point.
6. 6
   Drain the noodles and rinse immediately under cold running water while rubbing them between the palms. This cold-water finishing step develops the characteristic surface elasticity and removes excess starch. Rub until the surface of the noodles feels distinctly smooth and slightly slippery, not floury.
7. 7
   For the kake dashi: steep the konbu in cold water for 30 minutes. Bring to just below a simmer over gentle heat. Remove the konbu before the water boils. Bring to a full simmer, add the katsuobushi, and remove from heat immediately. Steep for 3 minutes, then strain without pressing. Season with usukuchi soy sauce and mirin. The finished dashi should be pale golden and clear — not brown.
8. 8
   To serve atsu-atsu (hot): briefly re-warm the noodles in boiling water for 30 seconds, drain, and portion into bowls. Ladle the hot kake dashi over the noodles at 75–80°C. Place one raw egg in each bowl. The broth should be pale gold, the noodle surface visibly smooth and glossy.