German KUKA Robotics' robot LBR iiwa demonstrates a flower arrangement at the International Robot exhibition in Tokyo, Wednesday, December 2, 2015. (Photo by Shizuo Kambayashi/AP Photo)

A woman looks at goldfish through the warped wall of a fish tank at the Art Aquarium exhibition in Tokyo July 10, 2015. Several thousand goldfish are displayed in dozens of uniquely shaped tanks, using LED lights, projection mapping and music in a show that was produced by Japanese designer Hidetomo Kimura. (Photo by Thomas Peter/Reuters)

Models clad in costumes of video game charactors pose at a game booth during the Tokyo Game Show 2016 in Chiba, suburb of Tokyo, on September 15, 2016. Sony took centre stage at the annual four-day event, with its virtual reality headset ready to hit store shelves for the Christmas shopping season. (Photo by Toru Yamanaka/AFP Photo)

A campaign model demonstrates crazy eyes glasses during the International Tokyo Toy Show 2016 in Tokyo, Japan, 09 June 2016. The trade show opens to the general public on 11 and 12 June. (Photo by Christopher Jue/EPA)

A woman holds a hedgehog at the Harry hedgehog cafe in Tokyo, Japan, April 5, 2016. In a new animal-themed cafe, 20 to 30 hedgehogs of different breeds scrabble and snooze in glass tanks in Tokyo's Roppongi entertainment district. Customers have been queuing to play with the prickly mammals, which have long been sold in Japan as pets. The cafe's name Harry alludes to the Japanese word for hedgehog, harinezumi. (Photo by Thomas Peter/Reuters)

A model presents a creation of YUKIHERO PRO-WRESTLING by designer Yukihiro Teshima from his Autumn/Winter 2018 collection during Fashion Week Tokyo in Tokyo, Japan March 20, 2018. (Photo by Issei Kato/Reuters)

Bikini-clad women sit as they operate a 3.6 metre-high custom-made female robot at the “Robot Restaurant” in Kabukicho, one of Tokyo's best known red light districts, August 15, 2012. (Photo by Tokyo Scum Brigade)