Danchiku is a childhood friend of Kaburagi's. The two were previously part of a cycling group called "Team SS" or "Team Speed Shot." He thinks that Kaburagi is childish, but he also admires his strength as a cyclist. He supports Kaburagi not only as a cyclist when they ride together, but also as a friend. When Kaburagi was forced to ride alone and was struggling, Danchiku offered him encouragement. He also does not appear to have any hard feelings about Kaburagi being the only one to join the Inter High team.