Wanko soba is a traditional Japanese noodle dish originating from Iwate Prefecture. It consists of small servings of soba noodles, typically served in a series of small bowls. Diners eat the noodles quickly, and the bowls are refilled continuously by the server until the diner signals they are finished. The experience of eating wanko soba is both fun and competitive, as many people try to eat as many bowls as possible. It is often accompanied by various toppings and dipping sauces, enhancing the flavor of the soba noodles. This dish is popular among tourists seeking a unique culinary experience in Japan.