Special Investigation Nine Season 1 • TV Show
Special Investigation Nine • TV Show • Rating 5.7 out of 10
seasons Season 1 
Season 2
Season 3
Season 4
Season 5
Season 6
Season 7
Season 8
Seasons of Special Investigation Nine
Special Investigation Nine currently has 8 seasons and 85 episodes. Most episodes run for around 45 minutes, offering a comfortable mid-length viewing experience. The series is currently marked as "Returning Series". The most recently aired episode came out in 2025.
Special Investigation Nine Season 2 • TV Show
Special Investigation Nine Season 3 • TV Show
Special Investigation Nine Season 4 • TV Show
Special Investigation Nine Season 5 • TV Show
Special Investigation Nine Season 6 • TV Show
Special Investigation Nine Season 7 • TV Show
Special Investigation Nine Season 8 • TV Show
release-radar
When is the next season of Special Investigation Nine coming out?
Special Investigation Nine is listed as an ongoing series with a "Returning Series" production status, but the next episode or season has not yet been given a firm air date in the official schedule. The most recent episode aired on June 11, 2025, so any future release date is likely to fall after that. Earlier seasons have arrived roughly once a year, so fans typically look to the same part of the calendar for new episodes.
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watch-it
Where to watch Special Investigation Nine for free?
Special Investigation Nine is available to stream on SuperFilmz. The series is primarily produced for audiences in Japan, so availability can vary by region. However, you can watch full episodes of Special Investigation Nine for free on SuperFilmz, with ads.
overview
What is Special Investigation Nine about?
The #9 investigation team has been disbanded and members of the #9 investigation team have been scattered around. One year later, the Chief of the National Police Agency, Sojiro Kandagawa, orders the creation of a special investigation team to cover from the initial investigation until it is sent to the prosecutor's office. Sojiro Kandagawa appoints Sakutaro Munakata as the leader of the special investigation team. Former #9 investigation team members join the special investigation team. It blends drama elements. The series reflects a distinct Japan style and perspective.
release-timeline
Release pattern and schedule for Special Investigation Nine
Special Investigation Nine has been releasing episodes between April 2018 and June 2025 across 8 seasons. So far there are 85 released episodes, giving you plenty of story to catch up on before the next drop. On average, new seasons have arrived roughly once a year (12 months between premieres), which is a common pattern for scripted TV. Until a new date appears, June 2025 remains the latest confirmed release window for the show.
cast
Cast and creators of Special Investigation Nine
The main cast includes Yoshihiko Inohara, Michiko Hada and Kanji Tsuda.
Yoshihiko Inohara
as Naoki Asawa
Michiko Hada
as Shiho Komiyama
Kanji Tsuda
as Kengo Murase
Mitsuru Fukikoshi
as Yasushi Aoyagi
Hiromasa Taguchi
as Hideaki Yazawa
Yuki Yamada
as Ryo Shindo
Sachie Hara
as Masumi Hayasegawa