In residential areas in Tokyo, the speed limit is 40km/h (24mph), or 30km/h (18mph) on side streets. There are other areas in the city that are 50km/h (31mph) and 60km/h (37mph) too, so keep an eye out for signs that state the maximum speed acceptable. At Shibuya Crossing, for example, the speed limit is 40km/h (24mph). Search rental cars on KAYAK