The Monster Within - Production & Contact Info

The Monster Within (2025– )
TV Series | Drama

The Monster Within (2025– )

TV Series | Drama

A lonely lawyer falls for a murderer in this Japan-Korea drama. Mamono explores dark themes of desire, infidelity and domestic violence through visually striking scenes of people's twisted lives.

Seasons

1 See all

Directors

Takashi Ninomiya | Jin Hyuk | Yûsuke Taki

Writer

Erika Seki

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Edit Released

Updated Apr 18, 2025

Release date (First episode)

Apr 18, 2025 (Japan)

Contacts

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Cast	+ Add Cast
46 cast members

Name	Episodes	Known for
Kôji Ohkura Subaru Konno Subaru Konno See fewer	8	FLCL (2000)
Motoki Ochiai Jun Nada Jun Nada See fewer	8	Love Exposure (2008)
Kumiko Asô Ayame Kajin Ayame Kajin See fewer	8	Pulse (2001)
Misuzu Kanno Youko Nogami Youko Nogami See fewer	8	Tales from Earthsea (2006)
Kana Kita Kanon Minamoto Kanon Minamoto See fewer	8	Gannibal (2022)
Akihisa Shiono Iteya Minamoto Iteya Minamoto See fewer	8	Zyuden Sentai Kyoryuger vs. Go-Busters: Dinosaur Great Battle! Farewell, Eternal Friends (2014)
Tomu Miyazaki Sanichirou Imura Sanichirou Imura See fewer	8	In Love and Deep Water (2023)
Mayu Miyamoto Kurumi Nagisa Kurumi Nagisa See fewer	8	Voice: Emergency Control Room 110 (2019)
Shirô Sano Okutaro Noda Okutaro Noda See fewer	7	Godzilla 2000 (1999)
Jiei Wakabayashi Kei Nikawa Kei Nikawa See fewer	7	Kamen Rider Zi-O: Over Quartzer (2019)
Nuno Uraji Masumi Kinbara Masumi Kinbara See fewer	7	No Domestic Work for Ms. Saionji! (2024)
Misaki Kitajima Iteya Minamoto (high school) Iteya Minamoto (high school) See fewer	7	The Monster Within (2025)
Hiroshi Yamamoto Kosuke Sohara Kosuke Sohara See fewer	6	Kamen Rider Black Sun (2022)
Tsuto Kawai Tatsuhiko Choga Tatsuhiko Choga See fewer	6	Believe: Kimi ni Kakeru Hashi (2024)
Arashi Fukasawa Junior coach Junior coach See fewer	5	Kamen Rider Decade (2009)
Norito Noji Clerk Clerk See fewer	3	The Diamond Sleeping in the Sea (2024)
Goin Naito Detective Detective See fewer	3	The Monster Within (2025)
Asami Shibuya Manager Manager See fewer	2	Hurt (II) (2015)
Momoko Michioka Newscaster Newscaster See fewer	2	Yakusoku - 16nenme no shinjitsu - (2024)
Kôsuke Takaki Coach Coach See fewer	2	Bullet Train Explosion (2025)
Ken Ohsawa Toshio Minamoto Toshio Minamoto See fewer	2	Video Girl Ai (1991)
Akana Ikeda Kanon Minamoto (High school) Kanon Minamoto (High school) See fewer	1	Alice in Borderland (2020)
Joe Odagiri Actor Actor See fewer	1	They Say Nothing Stays the Same (2019)
Masayo Umezawa Suzue Shindo Suzue Shindo See fewer	1	Tales from Earthsea (2006)
Riho Takada Police Officer Police Officer See fewer	1	Kamen Rider × Super Sentai: Super Hero Taisen (2012)
Chihiro Ôtsuka Yuri Kajin Yuri Kajin See fewer	1	Godzilla: Final Wars (2004)
Jun Hashizume Jota Kajin Jota Kajin See fewer	1	Godzilla vs. SpaceGodzilla (1994)
Mayumi Oka Fumi Kajin Fumi Kajin See fewer	1	Trick (2000)
Yuno Sawada Kanon Minamoto (child) Kanon Minamoto (child) See fewer	1	Marry My Husband (2025)
Reina Takashima Actress Actress See fewer	1	Ubawareta boku-tachi (2024)
Fuga Shibazaki Jun Nada (high school) Jun Nada (high school) See fewer	1	11 Rebels (2024)
Haruno Nachi Nao Kato Nao Kato See fewer	1	The Monster Within (2025)
Kana Tokue Actress Actress See fewer	1	Red Blade (2018)
Towa Natsume Nao Kato Nao Kato See fewer	1	Jâ, Tanta ga Tsukutte-miroyo (2025)
Naoki Sakamoto Judge Judge See fewer	1	Hiru (2022)
Makoto Araki Judge Judge See fewer	1	Godzilla Minus One (2023)
Ayumi Yokouchi Lecturer Lecturer See fewer	1	Time Traveler's Disease (2024)
Kunihiro Suda Prosecutor Prosecutor See fewer	1	Godzilla Minus One (2023)
Sato Tanaka Mistress Mistress See fewer	1	A Queen and an Old Maid (2023)
Tomohiko Ichihara Customer Customer See fewer	1	Kamen Rider Gavv (2024)
Rin Okabe Actress Actress See fewer	1	AKBINGO! NEO (2021)
Tara Nakashima Mayumi Minamoto Mayumi Minamoto See fewer	1	Kisspeptin Chronicles (2023)
Umi Kisaki Trainee Trainee See fewer	1	Ninja ni Kekkon wa Muzukashi (2023)
Hina Sasahara Actress Actress See fewer	1	Zaibatsu fukushu - Ani-yome ni natta moto-yome - (2025)
Himari Sasahara Actress Actress See fewer	1	The Monster Within (2025)
Ayumu Oikawa Trainee Trainee See fewer	1	The Monster Within (2025)