Watch Online: Monster (2025)

Monster (2025) is a gripping Japanese mystery-drama that resurrects a cold case two decades in the making. When a routine missing persons investigation unexpectedly intersects with a decades-old disappearance, two detectives with a troubled past must overcome their differences to uncover the truth. This compelling series blends psychological tension with procedural intrigue, making it essential viewing for mystery fans.

The Story Behind Monster (2025)

A quarter-century of unanswered questions haunts a small Japanese community. Twenty-five years ago, a college student vanished without a trace—the only evidence a severed finger joint left behind. The case has gone cold, but the wound remains fresh for those closest to her: especially her twin brother, now serving as a local police officer.

When a new case lands on their desks—a missing elderly man—it becomes the thread that unravels everything they thought they knew. Forced to partner with an elite detective transferred from the capital, someone he clashes with immediately, the twin brother discovers that the present and past are inextricably linked. As they dig deeper, the lines between victim and perpetrator blur, and the definition of a "monster" becomes far more complicated than anyone anticipated.

Release Date & Episode Guide

Monster premiered on July 6, 2025, and has concluded its run. The series consists of 1 complete season with 10 episodes, each running approximately 60 minutes. The finished status means you can watch the entire story arc without waiting for new releases.

Full Cast & Characters

The ensemble cast brings depth and authenticity to this mystery series. The stellar lineup includes Ken Yasuda, Koshi Mizukami, Atsuro Watabe, Ken Mitsuishi, Atsuko Takahata, Ayame Goriki, Shingo Fujimori, Sei Matobu, Taichi Saotome, and Shiori Kubo. Each actor delivers nuanced performances that elevate the psychological complexity of the narrative.

Creative Team & Production Details

• Directors & Creators: Kosuke Suzuki, Tatsuya Ikezawa
• Network: WOWOW Prime
• Production Studios: WOWOW, UNION TV & MOTION PICTURE CO., LTD.
• Country of Origin: Japan
• Genre: Mystery, Drama
• Format: Television Series
• Audience Rating: 8.5/10

Where to Watch Monster (2025) Online

Streaming availability for Monster continues to expand across platforms. To find where you can watch the complete season online, check your preferred streaming service or visit their platform directly. As availability updates, we'll keep this information current.

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