Tokyo police to introduce AI-based accident reconstruction system

The Tokyo Metropolitan Police Department conducts an on-site investigation of a fatal hit-and-run incident, with traffic restrictions in place, on Dec. 22, 2025, in Adachi Ward, Tokyo. Tokyo's Metropolitan Police Department plans to introduce a new system that can reconstruct traffic accidents using artificial intelligence, it was learned Wednesday. The system will combine AI with 3D spatial data from accident sites and footage from nearby security cameras, reducing the need for lengthy on-site inspections, which require traffic restrictions and often cause congestion and economic losses. The MPD plans to test the new system from June 2027 and launch full-scale operations in January 2028. Related expenses have been included in the police department's budget request for the next fiscal year. Currently, fatal accidents and hit-and-run incidents are investigated through on-site inspections, in which vehicles are positioned as they were at the time of the crash and measurements are taken to produce reports and diagrams.