Japan's House of Representatives passed an amendment to the Act on Punishment of Automobile Driving on Thursday, establishing numerical standards for dangerous driving causing death or injury [1].
The law aims to eliminate ambiguity in how dangerous driving charges are applied. For years, bereaved families and legal advocates argued that vague requirements led to inconsistent sentencing and an inability to hold reckless drivers fully accountable [1, 5].
Under the new standards, a driver faces dangerous driving charges if they exceed the speed limit by 50 km/h on roads where the maximum speed is 60 km/h or less [1, 2]. On roads with a speed limit exceeding 60 km/h, the threshold for the charge is a speed 60 km/h over the limit [1, 2].
The legislation also introduces a specific alcohol concentration threshold. A driver will be charged under the dangerous driving statute if their breath alcohol concentration is 0.5 mg per liter or higher [1, 3].
These charges carry a maximum penalty of 20 years in prison [1].
Megumi Chobun, a bereaved family member from Oita Prefecture who attended the session, said the law represents a significant step forward. "Finally this time has come, and I feel it is a very great step forward," Chobun said. "In the future, there will be fewer bereaved families who continue to suffer for many years like we did" [1].
The Ministry of Justice and the House of Representatives moved the bill through the plenary session on June 25, 2026 [1, 2].
“"Finally this time has come, and I feel it is a very great step forward,"”
By replacing subjective judicial interpretations with rigid numerical thresholds, Japan is shifting toward a more deterministic legal framework for traffic fatalities. This reduces the discretionary power of prosecutors and judges, making it easier to secure convictions for extreme speeding and intoxication while providing a predictable legal standard for the public.
