Sushi served on a conveyor belt at a Kappa Sushi restaurant in Yokohama’s Totsuka Ward (Asahi Shimbun file photo) The president of the company that runs the Kappa Sushi restaurant chain is under investigation for allegedly obtaining trade secrets unlawfully from rival Hama-sushi Co. Kappa Create Co., which operates the major conveyor-belt sushi restaurant chain, said the Metropolitan Police Department is investigating its president, Koki Tanabe, on suspicion of violating the Unfair Competition Prevention Law. Police searched the head office of Kappa Create in Yokohama’s Nishi Ward on Jun...