Koichi (浩一 Kōichi) is the smallest child with rider helmet who could not get on the bus, Koichi who wore a transformation belt.

Seeing that children who failed to ride also follow the bus, "It is so!" And strikes a cyclone tricycle as soon as he comes up with a good idea. Koichi is riding with "Kamen Rider's cyclone is catching up! I'm catching up! Let's go for Kamen Rider!" Koichi chasing a bus with that cyclone tricycle. Takeshi Hongo and Kazuya Taki walking to the waterfall pass.

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