Originating in London, this light-hearted event encourages participants to ride through their city on vintage bicycles while sporting classic tweed attire. In addition to the fun, the idea is to encourage cycling culture and road safety. This year's route starts and ends at Daikanyama Station, where you can also look forward to a tea party and an awards ceremony for the best dressers. At night, the action continues at the official afterparty, held at Marunouchi House. Registration for Tweed Run is open until September 21 – sign up here (in Japanese only).