May 9th, 2018. Sumo Training Hall, Asahi University, Mizuho Gifu, Japan. Two female members of the Asahi University Sumo Club practice their shiko, a foot stomping technique, during a training session. The team, both males and females, practice most weekdays for at least two hours. On the left, Ishizaki Nanami, 19 years old, and on the right Saki Ichihara, 18 years old.