I assume they mean: Given turning/waiting car A, passing car B that is going straight and car C coming from right going straight. Car B likely has right of the way as they are going straight and they are on the left from viewpoint of car C, but car C may not see behind car A (like due to it being truck for example). Both B & C might think they have right of the way. B due to fact they should normally only need to avoid people coming from left and he can see there is no one there, C due to fact he entered intersection when he only saw A who is waiting to turn. I don't know Japan law so I don't know actually has right of the way here (in Finland A would actually have right of the way in mirrored situation as you always need to yield those coming from right in equal intersection, even if they are turning left).