A viral video trend in Japan has got sushi conveyor-belt restaurants racing to prevent food tampering. One chain, Kura Sushi, said it will use artificial intelligence to look for "suspicious opening and closing of sushi plate covers," Nikkei Asia reported this week. Kura Sushi plans to start upgrading existing cameras, which are used to track the dishes customers take from conveyor belts to determine their bill, by early March. If the system detects suspicious behavior, it will alert employees. "We want to deploy our AI-operated cameras to monitor if customers put the sushi they picked up with their hands back on the plates," a spokesman told CNN. "We are confident we will be able to upgrade the systems we already have in place to deal with these kind of behaviors."