Suiyo Mystery 9
- Title: 水曜ミステリー９
- Title (romaji): Suiyo Mystery Gekijo
- Also known as: Wednesday Mystery 9
- Episodes: 141 (as of 2009-Mar-04)
- Genre: Tanpatsu-formatted weekly mystery series
- Broadcast network: TV Tokyo
- Broadcast period: Wednesday 21:00 to 22:48
- Broadcast start/end: 2005-Apr-?? to 2009-Mar-04
Suiyo Mystery 9 is a weekly mystery series. Virtually all storylines follow along the following path:
- A murder occurs early on.
- A lead person attempts to solve the case.
- A murderer is found, and usually confesses.
Each week features a fresh new cast and storyline. Most of the cast consist of B-artists or artists who were big at one time but are on the decline in popularity.