Ikemen Sobaya Tantei

Fujiki Naohito - Higuchi Juntaro
Horiuchi Keiko - Higuchi Itako
Furuta Arata - Ikeda Masahiko
Namase Katsuhisa - Kuroda Kinzo
Kyo Nobuo - Koji
Kawahara Kazuma (川原一馬) - Yuji
Takenaka Naoto - Hoissura Hosoguchi (ep1)
Nakagoshi Noriko (ep2)
Kyo Nobuo as Koji (ep1-4)
Kawahara Kazuma (川原一馬) as Yuji (ep1-4, 12-13)
Tomimori Andrew (冨森アンドリュー) - Andrew (ep5-6)
Tomimori Justin (冨森ジャスティン) - Justin (ep5-9, 12-13)
Kimisawa Yuki - Yuki (ep7-13)
Kaneko Tadashi (金子直史) - Tetsuji (ep9-10)
Ebisawa Kenji (海老澤健次) - Kenji (ep12-13)
Kido Yuya - Yuya (ep12-13)
Takenaka Naoto - Hoissura Hosoguchi (ep1-2)
Nakagoshi Noriko (ep3-4)
Sato Eriko (ep5-6)
Kuroki Hitomi (ep9-8)
Kaho (ep9-8)
Rokkaku Shinji (六角慎司) (ep9-8)
Kyomoto Masaki (ep11-10)
Matsuo Takashi (松尾貴史) (ep11-10)
Tanimura Mitsuki (ep12-13)
Ueda Shinya (上田晋也) (ep12-13)

Season 2

Kyo Nobuo - Nobu (ep1-2,4-5)
Kawahara Kazuma (川原一馬) - Kazuma (ep1,3-4,6)
Ebisawa Kenji (海老澤健次) - Kenji (ep1,3-4)
Kido Yuya - Yuya (ep1-3,6)
Tomimori Andrew (冨森アンドリュー) - Andrew (ep2,5-6)
Tomimori Justin (冨森ジャスティン) - Justin (ep2,5)
Kaneko Naofumi (金子直史) - Naofumi (ep3,6)
Kimisawa Yuki - Yuki (ep4-5)
Wakabayashi Masayasu (若林正恭) (ep1)
Kasuga Toshiaki (春日俊彰) (ep1)
Iinuma Chieko (飯沼千恵子) (ep1)
Ueda Yui (上田結) (ep1)
Takashima Masahiro (ep2)
Kago Ai (ep3)
Nishioka Tokuma (ep3)
Yamamoto Koji (ep4)
Yoshitaka Yuriko (ep5)
Okada Yoshinori (ep6)
Kato Haruhiko (ep6)