London's Mayor Boris Johnson collides with 10-year-old Toki Sekiguchi during a game of Street Rugby with a group of Tokyo children, outside the Tokyo Square Gardens building October 15, 2015. The game was held with the attendance of school children, Nihonbashi, Yaesu and Kyobashi Community Associations and the Street Rugby Alliance to mark Japan hosting the Rugby World Cup in 2019. Johnson is in Japan to lead a trade mission as part of his plans to strengthen cultural ties with Tokyo, with the aim of encouraging investment, job creation and economic growth in London. REUTERS/Issei Kato