It has definitely been questionable. I am for USA as well, but I can't help but think if I was connected to the Japanese team I'd feel like I was getting "homered."
That play with the runner on third getting hit with the batted ball was just bizarre. Couldn't really tell from the camera angles if she was fair or foul when she was hit. It sort of looked like she was in fair territory from one angle, foul from another. But I was definitely wondering why there was no one on first if the ball hit her in fair territory. Glad they at least caught that.
The announcers said that that call was made by the Japanese umpire.