Officer Qianye is not fat in any episode, because when he was a child, he was chubby when he was in contact with Koike's youngest son. A closer look shows that Chiba often eats hamburgers and is led by Belmore to the Maori detective station for monitoring.

But in the 902 sentence of TV version of Detective Conan, police officer Qianye lost weight. Miike Naeko formulated several detailed weight-loss strategies for police officer Qianye and sent them to police officer Qianye by email. Because they didn't know each other at that time, Miike Naeko's signature on the courier was "the biggest fan in your universe".

In the "Weight Loss Raiders", Miike Naeko told police officer Qianye in detail about the diseases caused by obesity and the increased incidence of some diseases. Later, in the process of investigating the case, he always ran a way to lose weight by himself.

The role life of police officer Qianye;

Chiba Kazunobu's reasoning ability is average, and he will participate in handling cases in most cases. He is good at judo. Chiba Kazunobu is a standard otaku. He lives in an apartment. His room is messy and things are everywhere. He often overslept, which leads to being late.

He likes special models and special films since he was a child. He collects all kinds of special models at home. When he is on vacation, he will also watch some special movies at home. He likes hamburgers and other things. He suffers from hay fever and has love sweating's problems. His car was a Fiat 500, and later it was changed to a Nissan GT-R..