Air of unpredictability hangs over Rugby World Cup with adaptability the key | Robert Kitson

Unfamiliar surroundings and the potential for extreme weather means coaches in Japan must be ready for anythingTo appreciate just how different to the norm the 2019 Rugby World Cup is going to be, you only have to set foot outside. Even on a damp Monday in Tokyo, the humidity is unmissable and so is the air of novelty. Judging by the 15,000 locals who queued around the block just to watch Wales train in Kitakyushu, the next few weeks are going to challenge plenty of familiar assumptionsDrive – or rather crawl – through the busier business districts of the Japanese capital and images of the hos…