A Japanese sushi boss has paid a record $3.1m (£2.5m) for a giant tuna at the first new year’s auction in Tokyo’s new fish market. Self-styled “Tuna King” Kiyoshi Kimura bought the 278kg (612lbs) bluefin tuna, which is an endangered species. He spent more than twice the previous record of $1.4m, which he paid in 2013. Wholesalers and sushi company …