American Kris Hernandez, shown here battling Starfire, became the first foreigner to train from scratch and work her way up into Japanese women's pro wrestling. She earns $250 for a weekly show - but that's not the point. "I was doing it because it was cool," said Hernandez, who is now on a break after suffering a concussion.
The rough and tumble may also be an outlet for many of the wrestlers in a country where women are usually expected to be demure and cute, Hernandez said.
"Sometimes it's a part of themselves that they cannot normally express," she said.
"I have met so many that are so sweet and shy outside the ring, and then you get into the ring and they explode."