Friends who have eaten koya around me have always said it is delicious, and they are very willing to go back and eat again, saying that it is the best Udon noodles here. The door is really hard to find, and I walked back and forth a few times before seeing it. The store seems to have only a bar, an open kitchen. Many Japanese chefs and waiters. There is a vacancy around five o'clock on Saturday, and the queue starts at five or six o'clock. The menu is simple, a whole page of Udon, a variety of eating methods, cold noodles cold soup (with glazed noodles option), cold noodles hot soup (glazed noodles), hot noodles hot soup. There are also rice and side dishes. The taste is indeed excellent after eating. The weight is a bit small. I went with my friends twice. It is just right for normal girls to eat a whole meal. Those with a bigger appetite should need to be added.