In Japan most of the roads have their own limiting speeds. If the limiting speed is 40 km, a driver has to drive by less than 40 km. If you exceed the limiting speed much, you are arrested by a police. When you are caught for speeding and are fined, you have to pay a penalty fee.
It depends on how much speed you exceed the regulation speed.
Less than 15 km : 9,000 yen ($96.77 € 72.00)
15km - 20km : 12,000 yen
20km - 25km : 15,000 yen
25km - 30km : 18,000 yen
30km - 35km : 25,000 yen
35km - 40km : 35,000 yen
Over 40 km : 80,000 yen ($860.22 € 640.00)
The following sign says the limiting speed is 50 km.
Fortunately, I do not have a car, I will not be caught.
In Tokyo, having a car is not mandatory. We can live in this city without a car, because other traffic systems work well.
If you want to know something, ask me please.