Is a towing license required when towing a broken-down vehicle?

A towing license is not required when towing a broken-down vehicle regardless of the vehicle's weight. This is because the regulations in Japan allow a private driver to tow a vehicle using their own personal vehicle without needing a special towing license, as long as they adhere to certain guidelines.

It is important to note that although a towing license may be necessary for professional drivers or for specific types of towing that involve larger vehicles or specialized equipment, the casual act of towing a broken vehicle does not impose this requirement on private individuals.

The other options suggest conditions under which a license might be required, but these do not align with the general regulations that govern towing for personal use. Therefore, the correct understanding is that no towing license is mandated in the scenarios described.