r/japan • u/SkyInJapan • 10h ago
New 30-kph speed limit takes effect on Japan's residential roads
mainichi.jpTOKYO -- A revised enforcement ordinance under the Road Traffic Act took effect on Sept. 1 across Japan, lowering the statutory maximum speed on general roads without center lines or median strips from 60 kilometers per hour to 30 kph. The new limit applies mainly to narrow residential streets and other local roads used by residents in their daily lives.
The measure is intended to reduce serious accidents, as the pedestrian fatality rate rises sharply when a vehicle is traveling at more than 30 kph.
It is the first reduction in the statutory maximum speed on general roads since the Road Traffic Act took effect in 1960. Residential roads generally refer to roads used regularly by local residents with a carriageway width of less than 5.5 meters and no center line or median strip.
Of Japan's approximately 1.22 million km of general roads, about 870,000 km, or 70%, are less than 5.5 meters wide. Many of them will be covered by the new 30-kph limit.
However, where signs or road markings indicate limits such as 40 or 20 kph, those limits will continue to apply. The maximum speed will remain at 60 kph on multilane roads and other roads not covered by the new rule.
On relatively wide roads without center lines, including regional agricultural roads, authorities will install speed-limit signs suited to local road conditions.
According to the National Police Agency (NPA), the combined number of children aged 15 or younger and people aged 65 or older who were killed in traffic accidents on residential roads fell from 455 in 2015 to 288 in 2021. The figure had since hovered around this level before rising for the first time in three years, reaching 315 in 2025.
Data also show that in collisions between vehicles and pedestrians, the pedestrian fatality rate is less than 1% when the vehicle is traveling at 30 kph or less. The rate rises to 2.7% at speeds between 30 and 40 kph, and to 17.4% at speeds between 50 and 60 kph.
At a regular news conference, NPA Commissioner General Yoshinobu Kusunoki said, "We ask drivers to recognize that particular care is needed on roads shared by motor vehicles, pedestrians and cyclists."
In 2011, the agency issued a notice promoting the designation of "Zone 30" areas, where speed limits on school routes, residential streets and other designated roads are set at 30 kph or lower. As of the end of March this year, 4,457 such zones had been designated nationwide.
Data indicate that the number of fatal and serious-injury accidents fell by about 30% after the zone designation. The revised ordinance effectively extends similar speed restrictions to residential roads across the country.
Police have also established 249 "Zone 30 Plus" areas nationwide. These areas use physical measures such as speed humps to make it difficult for vehicles to travel faster than 30 kph, and police plan to expand the program.
The task of expanding awareness among drivers remains a challenge. The NPA said it would work to raise awareness through on-street campaigns and its website while enforcing the new limit.