Seven-Eleven Japan Co. plans to strengthen security at its convenience stores as more are being run by a single employee overnight due to a severe labor shortage.Under the new security system, employees will control access to the store, using a remote control to allow entry when a sensor detects that a customer has arrived at the entrance door, sources said.Convenience stores nationwide are struggling with a persistent worker shortage and rising wages, leading to more stores being operated by just one or two people during certain hours.Such stores often become a target of robbery and assaul…READ FULL ARTICLE