Tokyo Population 2024 Projection. Chart and table of population level and growth rate for the tokyo, japan metro area from 1950 to 2024. Japan’s population is projected to fall by about 30%, to 87 million by 2070, when four out of every 10 people will be 65 or older.
In 1950, the population of tokyo was 11,274,641. Japan’s 2015 census showed that southern kantō (tokyo, kanagawa, chiba, and saitama prefectures) accounted for 28.4% of the overall population.