Japan 19 hits Wales 7 as he is being tackled by another player. It's a clear shoulder with no attempt to wrap. Reviewed.
Ref comments (I'm paraphrasing):
"Contact is first to the chest, up to the head. Yellow card."
The sensible call, which should have happened with Mostert.
This happens in the 80th minute with Wales trailing 21-23. It gives Wales a penalty, they kick it out, maul it to the line from the 22, another penalty, slots the penalty for the win, 24-23. Quite a dramatic finish.