Just sharing an observation. There are so many high walls used in Japan's communities that it creates a ton of "blind" corners. The mirrors help, but you still need to be so careful driving a car of on a bicycle.
Great advice, I almost collided with another bike today coming around a corner too fast!
I have found myself driving slow like the locals because I almost hit someone that I didn't even see when I made my clearing turns. I think these blind corners are so dangerous.