A Pension Notebook issued by Japan Pension Service. The National Pension (国民年金, Kokumin Nenkin) is a pension system operated by the Japan Pension Service. All Japanese nationals and foreign residents are required to enroll in it. In 1942 the Workers Pension Insurance Act was enacted, and in 1944 the name was changed to Employees' Pension Insurance Act. It was amended substantially in 1954, and in