A competitor shows her nails during the Tokyo Nail Expo 2009 at Tokyo Big Sight on November 30, 2009 in Tokyo, Japan. (Photo by Junko Kimura/Getty Images)

Shooting star by Tony Wu, US/Japan. Winner, underwater. The electrifying reproductive dance of a giant sea star. As the surrounding water filled with sperm and eggs from spawning sea stars, Wu faced several challenges. Stuck in a small, enclosed bay with only a macro lens for photographing small subjects, he backed up to squeeze the undulating sea star into his field of view. The dancing posture of spawning sea stars rising and swaying may help release eggs and sperm, or may help sweep the eggs and sperm into the currents where they fertilise together in the water. Kinko Bay, Japan. (Photo by Tony Wu/Wildlife Photographer of the Year)

A Japanese white-eye is seen on a branch of cherry blossoms at Kyoto Imperial Palace on March 26, 2010 in Kyoto, Japan. (Photo by Akihiro I/Getty Images)

Yokozuna-ranked sumo wrestler Hakuho of Mongolia (top) throws Goeido of Japan during their bout on the final day of the 15-day Kyushu Grand Sumo Tournament in Fukuoka on November 26, 2017. Mongolian grand champion Hakuho won the latest sumo tournament on November 25 as Japan's national sport continued to draw media attention after another top wrestler faced a police probe into an alleged assault. He won the 15-day tournament at 13-1 by Saturday with one day remaining as his closest contenders were all defeated at 11-3 before his bout on the day. (Photo by AFP Photo/JIJI Press)

A woman walks past a mural painting on a street in Tokyo, Japan on Wednesday, April 25, 2018. (Photo by Koji Sasahara/AP Photo)

Palestinian girl Manar Al-Shinbari (R), 15, who lost her both legs by what medics said was Israeli shelling at a UN-run school where she was taking refuge during the 50-day war last summer, is helped by her sister to put on her headscarf in an apartment in Jabaliya refugee camp in the northern Gaza Strip January 13, 2015. Manar's mother and three of her brothers were killed in the same incident. The girl's family house was destroyed by Israeli shelling during the war. (Photo by Mohammed Salem/Reuters)

Young girls take ballet lessons at the New Dreams dance studio in the Luz neighborhood known to locals as Cracolandia (Crackland) in Sao Paulo, Brazil, August 14, 2015. For the young girls learning to jump and plie, the dance studio provides a way forward and out of the difficult environment they have grown up in. Brazil is one of the world's highest consuming countries of crack cocaine, and Cracolandia, or “Crack Land”, located in the outskirts of Sao Paulo, is one of the most intense and brutal hubs. (Photo by Nacho Doce/Reuters)

A dog relaxes in an oxygen capsule “DOGS O2” at the Ownd Cafe on September 13, 2007 in Tokyo, Japan. The capsules come in a variety of sizes available for both dogs and cats for relaxation purposes. (Photo by Koichi Kamoshida/Getty Images)