Appearances
- Flower, Sun, and Rain
- シルバー事件25区
- Flower Sun and Rain: MURDER AND MYSTERY IN PARADISE
- The 25th Ward: The Silver Case
Nomenclature
- Koshi (Flower Sun and Rain: MURDER AND MYSTERY IN PARADISE)
- Koshimizu (Flower, Sun, and Rain, Flower Sun and Rain: MURDER AND MYSTERY IN PARADISE)
- Mr. Investigator (Flower Sun and Rain: MURDER AND MYSTERY IN PARADISE)
- Mr. Koshimizu (Flower Sun and Rain: MURDER AND MYSTERY IN PARADISE)
- Mr. Yoshimitsu Koshimizu (Flower Sun and Rain: MURDER AND MYSTERY IN PARADISE)
- Yoshimitsu Koshimizu (Flower Sun and Rain: MURDER AND MYSTERY IN PARADISE)