The total population in Japan was last recorded at 127.0 million people in 2014 from 83.2 million in 1950, changing 53 percent during the last 50 years. Population in Japan averaged 112.91 Million from 1950 until 2014, reaching an all time high of 128.06 Million in 2010 and a record low of 83.20 Million in 1950. Population in Japan is reported by the Statistics Bureau of Japan.