Do you know the age of Namihei Isono, the father of Sazae-san (of the famous manga & TV series)? He was a full-time employee during Japan’s period of high economic growth and his wife was a full-time housewife. The population pyramid of the large Isono family was triangular in shape, as was the population pyramid of Japan. It may come as a surprise, but Namihei was 54 years old! He was in his 50s and already an old man who would soon reach the mandatory retirement age and go on the pension. Since that time, society has changed significantly. To respond to these changes in society, the pension system should also be reformed.