Taizo is Ran's father. He is the local Chief of Detectives. He disapproves of his daughter's lifestyle. He tries his best to make Ran say that she wants to be a police officer, and often tries various tactics to get her to do various jobs helping the people (like not giving her money). He is also famous for employing a technique called "Taizo's Giant Swing of Fury" on Ran when he loses patience with her and once on Sayo.