I'm not gonna beat around the bush. Japan's Olympic authorities booked their male football (soccer) team on business class on Japan Airlines, and sent Nadeshiko, the female team, to London on economy.
I could lead you around this story with pretty words and carefully disguised anger, but the facts speak pretty loudly for themselves:
Nadeshiko Japan won the World Cup last year, and are expected to win medals in the Olympic Games.
Nadeshiko's won lucrative advertising deals with top sports brands, which the male team has not.
Nadeshiko won the people's honour award from the Japanese government for giving hope and inspiration to the Japanese populous after widespread destruction caused by last year's natural disasters.
The male team fits none of those criteria: they've never won the World Cup, nor are they expected to come anywhere near the awards podium in London. There are no significant differences in size or height between the male and female players.
The only justification for this segregation is sexism, pure and simple. I've signed a petition created by Sohko Fujimoto and Reina Komiya, addressed to the Japanese Football Association and Japan Airlines. We can't change what's already happened, but we can sure as hell let them know that this is completely unacceptable. The petition takes about ten seconds to fill out.