When Fumino Sugiyama, then a fencer for the Japan women’s national team, decided to come out to one of his coaches as a transgender man, he was not sure what to expect.

What followed shocked him in its brutality.

"You’ve just never had sex with a real man,” the coach responded, and then offered to perform the deed himself, according to a letter that Sugiyama wrote last fall to Thomas Bach, president of the International Olympic Committee.