Birthday: May 24
The dean of the hospital in Sotoba, Toshio resigned from university hospital, returning to take up his father's position when he passed away. He is fondly given a nickname, "Waka-sensei", by his colleagues as well as the residents. Toshio has a dislike to both his mother and his late father, as both of them often put reputation of the Ozaki family before anything else. He is childhood friends with Seishin Muroi and Mikiyasu Yasumori. He is a 32-year-old chain smoker and is married to Kyouko who manages an antique shop. He is baffled by the mysterious deaths and swears to solve the case and protect his village. One of the two main protagonists in the series.