Izumida is a 33 year old Lieutenant in the Metropolitan Police working under Ryoko.

Based on a series of light novels written by Tanaka Yoshiki and illustrated by Kakinouchi Narumi. 
The story revolves around Ryouko Yakushiji, a 27-year-old multilingual investigator that graduated from Tokyo University's elite Department of Law, and the bizarre cases she faces while working for the Tokyo Metropolitan Police. Yakushiji not only has to deal with supernatural beings in her line of work, but also her rival Yukiko Muromachi, another equally talented and beautiful police investigator. 
(Source: AniDB)

[Profile](https://osawa-inc.co.jp/men/kiuchihidenobu/)

The story revolves around Ryouko Yakushiji, a brilliant 27-year-old elite investigator with the Tokyo Metropolitan Police. Together with her subordinate Junichirou Izumida, the two often investigate bizzare and supernatural cases. In addition with the paranormal, Ryouko also has a longstanding rivalry with Yukiko Muromachi, another talented police investigator. 
(Source: Anime News Network)

Junichiro Izumida