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Title: Keishicho Sosa Ikka 9 Gakari Season 4 (Japanese Drama)
- Also Known As: 警視庁捜査一課９係 4
- Genre: Crime, Drama
- Broadcast Date: July, 2009
- Total Episodes: 11
- Casts: Fukikoshi Mitsuru, Hada Michiko, Inohara Yoshihiko, Taguchi Hiromasa, Tsuda Kanji
- English Subs: Yes
- Ost: N/A