The 20th film, Detective Conan: The Darkest Nightmare, opened in Japan last April, and set a record high for the film franchise at the box office.
The official website for Meitantei Conan Kara Kurenai no Love Letter (Detective Conan: Crimson Love Letter), the 21st Detective Conan (Case Closed) anime film, began streaming the first full trailer for the film on Wednesday.
Kobun Shizuno, the director of the last six Detective Conan films, will return to direct the film at TMS and V1 Studio.
The film will be a love story set in Osaka, and it will feature Heiji Hattori and Kazuha Toyama.