The measure is aimed at reducing accidents in urban areas with heavy pedestrian traffic and narrow streets, marking a major shift in the country’s traffic rules as these roads account for around 70% of all ordinary roads nationwide.
[…] above [30 kph] the risk of pedestrians suffering fatal injuries in accidents is said to spike.
[…]
The aim of the speed limit change “is to prevent accidents by stopping dangerous driving, such as failing to slow down even on busy streets”


I don’t understand the question. What I meant was, if the sign says 30, most people are doing at lead 39-40 (some up to 49).
i think they’re alluding to how speedometers are generally made to display a couple units above true speed? but I’m not sure why
Our vehicle inspections (3rd year for new vehicles otherwise every 2 years) in Japan strictly test the speedo, but I guess I don’t know for sure that they aren’t letting it display faster than reality.