Koyama Seimen has been making udon since 1945 using their grandfather's original recipe. Located in the "Bichu" region in the southwestern part of Okayama Prefecture, an area famous for its handmade noodles, Koyama Seimen crafts their noodles in the traditional way, making daily adjustments depending on the season, temperature and weather. It requires great skill to combine the various grains with the wheat flour and even though it takes three to four times longer, they dry their noodles naturally allowing the moisture to gradually drip out, resulting in a fine, smooth texture.