I don't side any team, but this is just what I've observed.
Thailand lost 2 points in the last set due to the head coach. From what the referee is gesticulating, I guess the coach did not follow the protocols of the game?
Japan didn't play very well in this game. There were so many lucky points scored. Thailand sure had a better base in terms of skills, and they should have won this game.
This is just a personal comment, I was just very put off by the fact that some Thailand players were very rude. Some of them gave "bitch" faces and pointed towards Japan's side during and off play saying things. I may be bias, but Thailand could show more sportsmanship by keeping their mouth shut and put on a good fight.