Kyokugen Suiri Coliseum
- Title: 極限推理コロシアム
- Title (romaji): Kyokugen Suiri Coliseum
- Title (English): Surviving Games in the Colosseum
- Also known as: The Ultimate Detective Game
- Format: Renzoku
- Genre: Suspence, mystery
- Episodes: 4
- Broadcast network: YTV
- Broadcast date: 2004-May-03 to 2004-May-06
When seven people wake up to find themselves locked up in a strange building, they receive a chilling message from their "host" via a computer: there is a killer in their midst! One by one they will all be murdered if they do not deduce the killer's identity. They also learn that seven people are locked away in another building, which they can communicate with via the computer, and that there is another killer hidden among that group as well.
The computer then explains to them the rules of the "game". They must guess the identity of the killers in both groups. The game can end in any of the following ways:
1. If they guess correctly… then they will each be given 10 million yen and set free.
2. If they guess wrong… then they will all be executed.
3. If they are all murdered before they guess the killers' identities.
4. If the game cannot be continued because of any unforeseen happening.
5. If the other group identifies the killers first… then they will all be killed!
Trapped in this twisted detective game, can they find the killer in time? Survival depends on information from the other group… but how can that information be trusted? And how can they trust each other? --YTV
- Kashiwabara Takashi as Komagata Shoichi
- Ayase Haruka as Shinozaki Ami
- Taguchi Hiromasa as Debuchi Keiichi
- Shiga Kotaro as Tagimoto Hachime
- Sato Jiro as Iida Ryuji
- Imai Masayuki as Kaga Hiroshi
- Shishido Miwako as Yoshiwara Harumi
- Tanaka Yoji Soga Kenichi
- Sato Sakichi (佐藤佐吉) as Tateichi Keiko
- Matthew Barron (マシュー・バロン) as Obana Kent
- Matsushima Ryota (松嶋亮太)
- Hatsune Hisami (初音ひさみ)
- Akuwa Yuriko (阿桑有里子) as Kosuke Hidomi
- Kunieda Ryohei (国枝量平)
- Original writing (novel): Yano Ryuo (矢野龍王) Kyokugen Suiri Coliseum
- Screenwriter: Oishi Tetsuya
- Director: Okamoto Koichi (岡本浩一)
- Music: Konishi Kayo (小西香葉)