Waymo is doing alright in San Francisco as well. That's not directly comparable to Tokyo, either, but I expect it's a much less distant of a comparison than Phoenix.
IDK, like I get the appeal for driverless cars, I just still don't like them.
Besides, if that is common, Waymo will have data on it and if it’s common enough, they’ll fix it.
I’ve sat in Waymos on 2 occasions, each on a separate ride, in which the car avoided collisions that would have happened due to bad human drivers. Your fear is worth examining closely as it’ll hold you back from enjoying this amazing technology.