Why does everyone ride mama chari shopping bikes? 4th attempt

Although this is a lot less true than even a year ago, it’s still quite striking coming from the UK where a male would probably have to cycle through a hail of jeers on the typical Japanese bike. Here’s an explanation I hadn’t come across before:

“It is illegal to ride a bike on which you cannot touch the ground when mounted (this is one of the things that the police check when registering your bike).”

Japan For Kids pg 23