True, avoid Japan, they will lock you up and then the investigation begins. Some guys just have the signs on in Jap airspace regardless of the ride. I hope it hasn't got the point where crew would consider not diverting to a Japanese port to avoid getting locked up at the expense of pressing on with injured pax/fa's. I would imagine medlink guidance be the only real option here. Go where they suggest for liability coverage.
As for not planning us through med to severe turbulence, I guess that would exclude flying in China for at least 6 months of the year, you might be on to something there!!!