- Country: Japan
- Genres: Drama, Mystery
- Release: 2017-11-03
- Director: Mari Asato
- Writers: Honobu Yonezawa , Mari Asato
- Language: Japanese
- Stars: Kento Yamazaki , Alice Hirose , Nazuki Amano , Kanata Hongo , Shihori Kanjiya , Fujiko Kojima , Hidekazu Mashima , Amane Okayama , Yuki Saito
- Runtime: 114 min
- Awards: N/A
- AKA: Hyouka: Forbidden Secrets , 氷菓 (Japan) , Hyouka: Forbidden Secrets (United Kingdom) , Hyôka , Hyouka: Forbidden Secrets (United States of America)
- Plot: As a high school freshman Hotaro has to choose a club to join and picks the Classic Literature Club as his sister had. Alongside fellow member Eru she happens across a decades' old text that indicates secrets of the school and its festival.
- IMDB:tt5573852
Hyouka: Forbidden Secrets Cast · · · ALL
Mari Asato
Director
Kento Yamazaki
Hōtarō Oreki
Alice Hirose
Eru Chitanda
Fujiko Kojima
Mayaka Ibara
Amane Okayama
Satoshi Fukube
Kanata Hongo
Jun Sekiya
Yuki Saito
Yoko Itoigawa
Shihori Kanjiya
Hidekazu Mashima