Millions, if not 10s of millions of bikes. This one got a ticket – how they knew who to make it out to is beyond me? Not broadly known, but there is no identification system in Tokyo (i.e. Social Insurance number).
As a testament to the Japanese and their honor/honesty – without a name – one can expect that the owner of the bike will go to the police station and pay the fine, despite being anonymous because that is what the culture dictates.
Rules make this city of 40M the most unique in the world.