Tsurumaru Udon Naha is a self-service udon shop near Naha Airport that serves udon, tempura, fish cakes, and rice balls. The noodles are made in-house and served in a light Kansai-style broth, with options such as burdock tempura udon and bukkake udon. Customers order udon first, then choose tempura, fish cakes, and rice balls, pay, and fill the broth themselves. Communication in Korean is difficult.