Iwasaki Taisho
Saki Ryuta [Kindaichi's junior]
Support Role

Hosoda Kanata
Makabe Makoto ["Mysteries Research Club" member] (Ep. 1)
Guest Role
Otomo Karen
Sakuragi Ruiko ["Mysteries Research Club" member] (Ep. 1)
Guest Role
Maeda Koki
Onoue Takahiro ["Mysteries Research Club" member] (Ep. 1)
Guest Role
Sugimoto Tetta
"Bana" / Tachibana Ryozo [School security guard] (Ep. 1)
Guest Role
Mitsuishi Ken
Matoba Yuichiro [Physics teacher] (Ep. 1)
Guest Role
Amano Hana
Aoyama Chihiro [Missing student] (Ep. 1)
Guest Role
Ozaki Usou
Murata Masaki [Detective] (Ep. 1)
Guest Role
Kitami Toshiyuki
Kumazawa ["Takahata construction" employee] (Ep. 1)
Guest Role
Kawano Kaisei
[6th victim of the curse] (Ep. 1)
Guest Role
Yo Kimiko
Kirigoe Hiruko [Cottage caretaker] (Ep. 2-3)
Guest Role
Yoshitani Ayako
Nagita Natsumi [Tour guide] (Ep. 2-3)
Guest Role
Ikuta Erika
Uryu Akane [Writer] (Ep. 2-3)
Guest Role
Koichi Mantaro
Izumaru Ken [Medical device manufacturer sales] (Ep. 2-3)
Guest Role
Kamio Yu
Wanize Takashi [Medical device manufacturer sales] (Ep. 2-3)
Guest Role
Takahashi Yu
Kanno Mika [Doctor] (Ep. 2-3)
Guest Role
Ishida Yumemi
Siren [Mythical creature] (Ep. 2)
Guest Role
Nakayama Katsumi
Fujimoto Tadashi [Patient] (Ep. 3)
Guest Role
Kaneko Risa
Izumaru Marika [Ken's daughter] (Ep. 3)
Guest Role
Tagawa Kanami
Mizuki [Ken's ex-wife] (Ep. 3)
Guest Role
Ono Takehiko
Shirakami Otomatsu [Sake brewery's president] (Ep. 4)
Guest Role
Yoshida Goro
Shirakami Sakon [Sake brewery's vice-president] (Ep. 4)
Guest Role
Terajima Susumu
Kurotaka Ginzo [Sake brewery's employee] (Ep. 4)
Guest Role
Okayama Amane
Sagimori Gen [Sake brewery's part-timer] (Ep. 4)
Guest Role
Ryo
Himekoji Kyoka [Innkeeper] (Ep. 4)
Guest Role
Yamane Kazuma
Kimon Kageomi [Fugitive] (Ep. 4)
Guest Role
Matsuura Sachiko
Shirakami Kotone [Otomatsu's late wife] (Ep. 4)
Guest Role
Funatsuki Aijo
Shirakami Rengetsu [Young] (Ep. 4)
Guest Role
Uchida Shinichiro
Kume [Detective of Nagano prefectural police] (Ep. 5)
Guest Role
Onodera Akira
Narusawa Kenta [Inn guest] (Ep. 5)
Guest Role
Tanabe Momoko
Kunieda Maki [Inn guest] (Ep. 5)
Guest Role
Nakagawa Daisuke
Ino Kohei [Inn guest] (Ep. 5)
Guest Role
Shinohara Yushin
Shishijima Takashi [Inn guest] (Ep. 5)
Guest Role
Morita Kokoro
Narusawa Saya [Kenta's sister] (Ep. 5)
Guest Role
Kumabe Yohei
Shimada [Detective of Yamanashi prefectural police] (Ep. 5)
Guest Role
Takahashi Tsutomu
Takabayashi Noboru [Detective of Kanagawa prefectural police] (Ep. 6-7)
Guest Role
Watanabe Dai
Itsuki Yosuke [Writer] (Ep. 6-7)
Guest Role
Totsuka Shota
Tsuzuki Tetsuo ["Tou TV" program director] (Ep. 6-7)
Guest Role
Miyazawa Emma
Nonaka Tomomi [Freelance editor] (Ep. 6-7)
Guest Role
Yamanishi Atsushi
Omura Ken ["Hyakusachuu Shuppan" director] (Ep. 6-7)
Guest Role
Imai Takafumi
Tokito Wataru ["Kandagawa Shuppan" editor] (Ep. 6-7)
Guest Role
Katsuya
Tachibana Goryuu [Non-fiction writer] (Ep. 6-7)
Guest Role
Hankai Kazuaki
Kikuzo [Goryuu's butler] (Ep. 6-7)
Guest Role
YUKIPOYO
Katsuragi Yurina [Idol] (Ep. 6-7)
Guest Role
Kobayashi Ryoko
Sudo Maiko [Tetsuo's girlfriend] (Ep. 7)
Guest Role
Sakurai Hijiri
Maeda [Hospital director] (Ep. 7)
Guest Role
Sendo Nobuko
Tatsumi Shino (Ep. 8)
Guest Role
Yoshimura Kaito
Tatsumi Ryunosuke (Ep. 8)
Guest Role
Fukuyama Shodai
Tatsumi Seimaru (Ep. 8)
Guest Role
Tanabe Kenichiro
Senda Saruhiko (Ep. 8)
Guest Role
Fukui Yuko
Ume Fuyuki (Ep. 8)
Guest Role
Yasoda Yuichi
Iwata Kazumi (Ep. 8)
Guest Role
Hayama Reiko
Tatsumi Ayako (Ep. 8)
Guest Role
Yamamoto Maika
Kozuki Leona (Ep. 9-10)
Guest Role
Tozuka Junki
Shirakami Kaito (Ep. 9-10)
Guest Role
Kirishima Reika
Hibiki Shizuka (Ep. 9-10)
Guest Role
Nanase Kou
Himori Fuyuhiko (Ep. 9-10)
Guest Role
Rokkaku Shinji
Mikita Takumi (Ep. 9-10)
Guest Role
Furukawa Yuuta
Eiji Kiryu (Ep. 9-10)
Guest Role
Kong Kuwata
Kageshima Juzo (Ep. 9-10)
Guest Role
Tsujioka Jinsuke
Shirakami Kousuke (Ep. 4)
Guest Role
Azuma Naoki
Shirakami Rengetsu (Ep. 4)
Guest Role