Detective Conan: Black Iron Submarine is an anime film that premiered in spring 2023, produced by TMS Entertainment.

About the production: the story comes from an original script, the film runs about 109 minutes and its current status is "finished".

Its main genres are drama and mystery, with themes such as Age Regression, Detective, Male Protagonist and Artificial Intelligence.

On AniList, Detective Conan: Black Iron Submarine has an average score of 82%, a very good score, and appears on 7,267 users' lists.

The franchise continues in or follows from: Meitantei Conan: Haibara Ai Monogatari - Kurogane no Mystery Train.

This time's location is set in the sea near the Hachijo-jima island, Tokyo. Engineers from around the world have gathered for the full-scale operation of "Pacific Buoy," an offshore facility to connect security cameras owned by the worldwide police forces. A test of a certain "new technology" based on a face recognition system is underway there. Meanwhile, Conan and the Detective Boys visit Hachijo-jima at Sonoko's invitation and receive a phone call from Subaru Okiya (a graduate student in the Graduate School of Engineering at Tokyo Metropolitan University, who is an FBI agent Shuichi Akai and a black-robed organization's Rye) informing them that a Europol employee was murdered in Germany by the Black Organization's Jin. Conan, who is disquieted, sneaks into the facility and finds that a female engineer has been kidnapped by the Black Organization...! Furthermore, a USB drive containing certain information in her possession ends up in the hands of the organization... A black shadow also creeps up on Ai Haibara (Detective Boys' Ai Haibara / Shiho Miyano / the Black Organization's Sherry),.. (Source: Crunchyroll)

Official synopsis from AniList.