Which of the following fines corresponds to the most severe punishment for driving without a license?

The fine of 500,000 yen is the most severe punishment for driving without a license in Japan because it reflects the seriousness with which Japanese authorities treat such offenses. Driving without a proper license poses significant risks not only to the driver but also to public safety, as unlicensed drivers may lack the necessary training or knowledge of traffic laws. Consequently, the penalties are designed to deter individuals from engaging in this illegal behavior.

This fine is considerably higher than other options, signaling the legal system's emphasis on compliance with driving regulations to ensure safety on the roads.