@jessta I wouldn't assume the picture is representative or that many such cases exist. Think it's a change of default/worst possible case but nearly all streets like that are already 40 or lower.
@jroper "The Japanese government decided Tuesday to cut the legal speed limit on narrow roads in residential areas to 30 kilometers per hour from the current 60 kph to reduce traffic accidents.
Roads less than 5.5 meters wide, around 70 percent of the total network of local routes, are expected to be subject to the revision of the traffic law that is set to take effect in September 2026."
So the change only applies to streets as narrow as what is pictured
@jroper "The Japanese government decided Tuesday to cut the legal speed limit on narrow roads in residential areas to 30 kilometers per hour from the current 60 kph to reduce traffic accidents.
Roads less than 5.5 meters wide, around 70 percent of the total network of local routes, are expected to be subject to the revision of the traffic law that is set to take effect in September 2026."
So the change only applies to streets as narrow as what is pictured