The Investigation Game Cast Etsushi Toyokawa Ryo Ishibashi Yukiyoshi Ozawa Takashi Sasano Reiko Kataoka Haruka Igawa Miyuki Matsuda Yoichi Sai Renji Ishibashi Ikuji Nakamura Masaomi Hiraga Mansaku Ikeuchi Akira Otaka Masashi Arifuku Wataru Shihodo Yuji Suzuki Yukari Onoe Daisuke Nagakura Taisei Miyamoto Shizuka Ochi Takashi Yamanaka Tasuku Emoto Mantarô Koichi Fusako Urabe Kyusaku Shimada Takeo Nakahara Toshie Negishi