Earlier quoted context omitted.
It’s just like an MOT in the UK, or the periodic checks in most countries for that matter. The car is exempt for the first few years, then gets checked yearly. Most cars pass with few, if any, repairs.
Thanks to ehnto providing the keyword, I found https://en.wikipedia.org/wiki/Motor-vehicle_inspection_(Japa... . It says: ... the system effectively represents an additional tax on used car ownership. Even owners of a perfectly maintained vehicle can expect to pay 100,000 yen (US $899) for a two-year inspection, and requirements are even stricter for vehicles over 10 years old leading to an extremely high effective t…
See the point #3 that you posted in your comment. Repairs/maintenance required to pass MOT (or equivalent inspection here) are in addition to the inspection fee.