Kagawa Prefecture (ancient Sanuki Province), Shikoku; highest udon consumption per capita in Japan
Sanuki udon from Kagawa Prefecture (historically Sanuki Province on Shikoku island) is Japan's most iconic and influential udon style, characterized by a firm, elastic, almost translucent noodle with square-ish cross-section and a texture described as 'koshi'—a resistant spring that distinguishes it from the softer udon of other regions. Kagawa's distinctive geography—limited rice production historically drove wheat cultivation; abundant salt from seto inland sea salt flats; dried sardines (iriko) from the inland sea for dashi—created the perfect conditions for an obsessive udon culture. The dough is made from strong bread-flour type wheat with high gluten content, mixed with salt water (the salt ratio is adjusted by season—more salt in summer to strengthen gluten), kneaded by hand then classically 'ashi-fumisoba' (foot-kneaded) by wrapping in plastic and treading the dough repeatedly with body weight. This extensive mechanical gluten development creates the characteristic snap-back elasticity. The noodles are cut to a consistent 3-4mm thickness. The simplest Kagawa service is kake udon (hot broth)—a bowl of noodles in iriko-kombu dashi, barely seasoned, with a raw egg and green onion. The prefecture has more udon shops per capita than anywhere in Japan.
Clean wheat flavor; characteristic elastic koshi springiness; iriko dashi broth is assertive and marine
{"Strong high-gluten flour essential—lower-protein flour cannot achieve the characteristic 'koshi' elasticity","Salt ratio adjusted seasonally: more in summer to strengthen gluten in warm temperatures","Foot-kneading (ashi-fumisoba) develops gluten beyond what hand-kneading achieves","Iriko (dried sardine) dashi is the characteristic Sanuki broth—more assertive than kombu-katsuobushi","Koshi (elastic springiness) is the defining quality benchmark—properly made Sanuki resists the bite"}
{"Rest dough wrapped at room temperature for 2 hours minimum after kneading to relax gluten","Foot-kneading: wrap dough in plastic bag on clean flat surface, tread evenly over entire surface","Cook in large volume of rapidly boiling water (minimum 8 liters per 200g noodles)","After boiling, shock in cold water for zaru cold service; return to hot water for kake hot service"}
{"Using all-purpose flour instead of high-protein bread flour—produces limp rather than elastic noodles","Insufficient kneading—gluten development requires sustained mechanical work","Cutting udon too thin—3-4mm is the benchmark; thinner loses the characteristic koshi","Overcooking—Sanuki udon should have significant bite resistance unlike soft regional udons"}
Shizuo Tsuji — Japanese Cooking: A Simple Art; Kagawa udon craft documentation