Having watched highlights of both games: hard to believe that KSA dominated the game in every aspect against Japan (78% to 22% possession!!!) and still lost the game! Either Saudi team is not that good, or Japan is not that strong!
Australians managed to beat Uzbekistan but I haven't seen Australia this weak since they joined AFC.
This is the problem with Asia, even when teams like Japan don't play well, they still manage to get away with it... that's my observation so far.