The Population Pyramid in Japan
Age
90 or above
85
66 years old: the number
of births decrease d in
1938-3 9 due to the
mobilizagtion of soldiers
for the Japan-China War
Males
Females
80
75
70
59 and 60 years old:
the number of births
decreased around the
cease-fire period
65
60
55
50
56-58 years old: the
first baby boom lasted
from 1947 to 1949
45
56-58 years old:
the first baby
boom lasted from
1947 to 1949
40
31-34 years old: the
second baby boom
from 1971 to 1974
35
30
25
20
15
10
5
0
150
Source：2025
125
100
75
50
25
0
0
Population
(in 10 thousands)
25
50
75
100
125
150
― “Population Projection for Japan (estimated December 2006),median projection,”National Institute of Population and
Social Security Reseach
2005 ― “Population Projection”as of October 1,2005,Statistics Bureau,MIC
Note: The solid line represents the figures for 2005 and the broken line represents the figures for 2025.
The population aged 90 or above cannot be calculated by age group and has collectively been put into
the“90 or above” age group.