A tourist washes his face to cool off at Bentendo Temple in Tokyo's Ueno Park, Monday, July 27, 2015. As temperatures rose, many locals and tourists alike came to the park to escape from the heat. (Photo by Ken Aragaki/AP Photo)

A man feeds wild sparrows at Shinobazu Pond in Tokyo's Ueno Park, Monday, July 27, 2015. As temperatures rose to some 35 degree Celsius (95 degree Fahrenheit) in the central Tokyo, many people cooled off near this manmade pond filled with lotus plants. (Photo by Ken Aragaki/AP Photo)

Women hold parasols as they wait at a pedestrian crossing on a hot day in Tokyo, July 27, 2015. (Photo by Thomas Peter/Reuters)

A man in soiled business clothes leans in the corner of a subway underpass in Tokyo, July 26, 2015. (Photo by Thomas Peter/Reuters)

A Buddhist monk collects donations as a woman rushes over a pedestrian crossing in the Ginza district of Tokyo, July 27, 2015. (Photo by Thomas Peter/Reuters)

A man walks outside a club with an advertisement depicting women from the Philippines in the red light district in Ota, Gunma prefecture, north of Tokyo, Japan, April 24, 2015. (Photo by Yuya Shino/Reuters)

A shop clerk works between cardboard boxes outside a discount drug store at a shopping district in Tokyo, Japan, July 29, 2015. Japanese retail sales rose 0.9 percent in the year to June but the pace of growth slowed for a second straight month, a sign consumer spending has yet to build enough momentum to be a key driver of economic growth. (Photo by Yuya Shino/Reuters)

A shopper looks at items inside a discount store at a shopping district in Tokyo, Japan, July 29, 2015. (Photo by Yuya Shino/Reuters)

A shopper looks at items outside a discount drug store at a shopping district in Tokyo, Japan, July 29, 2015. (Photo by Yuya Shino/Reuters)

A woman cycles past a sign of Nomura Holdings in Tokyo July 29, 2015. (Photo by Toru Hanai/Reuters)

Tropical fish from the southern Japanese island of Okinawa swim in a temporary aquarium in Tokyo's Ginza shopping district July 29, 2015. (Photo by Toru Hanai/Reuters)

People cross a junction in front of advertising billboards in the Shibuya shopping district in Tokyo July 31, 2015. Core consumer prices in Tokyo fell 0.1 percent in the year to July, government data showed on Friday, marking the first year-on-year decline since April 2013. (Photo by Thomas Peter/Reuters)

People crowd a street in the Shibuya shopping district in Tokyo July 31, 2015. (Photo by Thomas Peter/Reuters)

Tourists rest in the shade outside a Mizuho bank branch advertising its partnership with the Tokyo 2020 Olympic Games in the Ginza shopping districts in Tokyo, August 3, 2015. (Photo by Thomas Peter/Reuters)

A businessman rests his head on a bike in the central district of Ginza in Tokyo, August 3, 2015. (Photo by Thomas Peter/Reuters)

People walk past a photograph showing the Tokyo Tower in the Ginza shopping districts in Tokyo, August 3, 2015. (Photo by Thomas Peter/Reuters)

A tourist takes a picture with her smart phone as she stands in front of a luxury fashion boutique in the shopping district of Ginza in Tokyo, August 3, 2015. (Photo by Thomas Peter/Reuters)

A man holds an advertisement board for a special offer for a limited time sale, outside a clothing retail store at a shopping district in Tokyo, Japan, August 16, 2015. (Photo by Yuya Shino/Reuters)

A model dressed in an animation character's costume distributes leaflets to visitors at Tokyo International Anime Fair 2009 in Tokyo in this March 18, 2009 file photo. (Photo by Kim Kyung-Hoon/Reuters)

A man looks through a window of a monorail as it travels past office buildings in Tokyo August 26, 2015. (Photo by Toru Hanai/Reuters)

People look at a sculpture made of Lego bricks by Jumpei Mitsui that is part of the Shinjuku Creators Fest art festival in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

A man walks past the sculpture “Kazoerarenakatta Hoshitachi” by Tomohiro Inaba that is part of the Shinjuku Creators Fest art festival in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

A man sleeps in a courtyard of the nightlife district in Shinjuku in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

A man enters an adult amusement establishment in Shinjuku's nightlife district of Kabukicho in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

An overview shows Shinjuku's nightlife district of Kabukicho in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

A couple overlooks Shinjuku's nightlife district of Kabukichoi in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

A woman walks down stairs in a department store in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

People line up outside of the Robot Restaurant in Shinjuku's nightlife district of Kabukicho in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

People cross a junction in Shinjuku's nightlife district of Kabukicho in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

People stand outside a nightclub in Shinjuku's nightlife district of Kabukicho in Tokyo, August 27, 2015. The words on the left translates to “Open Invitation”. (Photo by Thomas Peter/Reuters)

A man rides a bike in Shinjuku's nightlife district of Kabukicho in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

A man get out of a taxi in Shinjuku's nightlife district of Kabukicho in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

A woman walks past a car reflecting the neon lights of a night club in Shinjuku's nightlife district of Kabukicho in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

A tout (C) walks in front of a car advertising a strip club in Shinjuku's nightlife district of Kabukicho in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

Women stand on the platform as a train pulls into Shinjuku Sanchome station in Tokyo, August 27, 2015. (Photo by Thomas Peter/Reuters)

A woman with a parasol walks by Shinobazu Pond in Tokyo's Ueno Park in Tokyo, Monday, July 27, 2015. (Photo by Ken Aragaki/AP Photo)

Women react to a sea of lotus plants, at Shinobazu Pond in Tokyo's Ueno Park, Monday, July 27, 2015. (Photo by Ken Aragaki/AP Photo)

Visitors pack a giant pool at Toshimaen amusement park in Tokyo, Sunday, July 26, 2015. (Photo by Shizuo Kambayashi/AP Photo)

A couple rests on the lawn at Shinjuku Gyoen National Garden in Tokyo Tuesday, July 28, 2015. (Photo by Shizuo Kambayashi/AP Photo)