The author, a high-school teacher, recounts his 12 years on "night patrol" in Yokohama City, where he comes face to face with youth dealing with issues ranging from self-mutilation to drug abuse.

A former Career Consultant, Takanashi, now works for a school as a Guidance Counselor. During Career Guidance meetings, he gives students data and tells them the realities of the world around them, hoping that...