United States of America, Australia, and Japan
Update: Hmmm. Kellid stated in the comments section that there might be something disrespectful about the direction in which the flags are blowing. To be honest, I hadn't given thought to the angle of the display, keeping more so in mind the height of the flags to each other and keeping the U.S. flag in front and center. However, upon review of the U.S. flag code, technically it is more proper to display the Union to the flags right (viewers left) so I have changed it. Since I changed it for the United States, I changed it for Japan and Australia as well, assuming that it would be more courteous. Thanks Kellid for the heads up.