Despite the name "Yakisoba," which includes "soba," the noodles used in Yakisoba are actually not made from buckwheat (as soba noodles typically are). Instead, Yakisoba noodles are made from wheat flour, water, and kansui (alkaline mineral water), similar to ramen noodles. These wheat noodles are typically yellow in color and have a chewy texture, making them well-suited for stir-frying.