Utilize the input text as a context reference, choose the right relationship between Keio and Tokyo from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Company : Keio Plaza Hotel Tokyo Thursday, August 20, 2015 10:35AM IST (5:05AM GMT) Keio Plaza Hotel Tokyo Hosts A Photo Exhibition"The Joy of Sports Photography 2015" Co-sponsored by The Mainichi Newspapers and Sports Nippon Newspapers Tokyo, Japan Keio Plaza Hotel (KPH), located in Shinjuku, Tokyo, will hold a photographic exhibition of various top Japanese professional athletes entitled “The Joy of Sports Photography 2015” from September 1 st to October 31 st , 2015.

Answer: location_of_formation