To be fair, kei trucks are horrible in crashes too. That’s a big part of states starting to ban them.

They’re horrible in crashes in the North American region. That’s because the average vehicle size in North America is much, much bigger than the vehicles in the Kei trucks’ region of origin. And streets in North America are, on average, much, much wider and permit higher speed traffic than those in Japan. The cars themselves aren’t inherently unsafe; if you keep them mostly on private property and only take them out on low-speed public roads with light duty vehicles, they’re still operating in an appropriate context. Also pretty appropriate in historic city centers where the roads aren’t too fast and the trucks and full size SUVs aren’t too numerous. But yeah, take one out on the interstate boxed between two semi trucks, an F-350, and a Suburban and you’re going to be in real danger.

Motorbikes are much worse in crashes than kei trucks, we are more than happy to make, sell and operate them. I don’t actually buy the “unsafe” reasoning. It’s also perfectly street legal to buy and drive cars and trucks from the 60s with abysmal safety ratings.