Japan BMI percentile tables (P3–P97)

Japan’s published BMI figures, P3 to P97 month by month, up to 19y 1m. Boys and girls separately, on the standard’s own curves.

boy

Japan · BMI, boy（kg/m²）
Age	P3	P15	P50	P85	P97
0 months	11.3	12.2	13.4	14.8	16.1
1 months	12.6	13.6	14.9	16.4	17.6
2 months	13.8	14.9	16.3	17.8	19.2
3 months	14.4	15.5	16.9	18.5	19.8
4 months	14.7	15.7	17.2	18.7	20.1
5 months	14.8	15.9	17.3	18.9	20.2
6 months	14.9	15.9	17.3	18.9	20.3
7 months	14.9	15.9	17.3	18.9	20.3
8 months	14.9	15.9	17.3	18.8	20.2
9 months	14.8	15.8	17.2	18.7	20.1
10 months	14.7	15.7	17.0	18.6	19.9
11 months	14.6	15.6	16.9	18.4	19.8
12 months	14.5	15.5	16.8	18.3	19.6
13 months	14.4	15.4	16.7	18.1	19.5
14 months	14.3	15.3	16.6	18.0	19.3
15 months	14.2	15.2	16.4	17.9	19.2
16 months	14.2	15.1	16.3	17.8	19.1
17 months	14.1	15.0	16.2	17.6	18.9
18 months	14.0	14.9	16.1	17.5	18.8
19 months	13.9	14.8	16.1	17.4	18.7
20 months	13.9	14.8	16.0	17.4	18.6
21 months	13.8	14.7	15.9	17.3	18.6
22 months	13.8	14.6	15.8	17.2	18.5
23 months	13.7	14.6	15.8	17.1	18.4
2 years	13.8	14.7	15.9	17.2	18.5
2y 3m	13.8	14.7	15.9	17.3	18.5
2y 6m	13.7	14.6	15.8	17.2	18.4
2y 9m	13.6	14.5	15.7	17.0	18.3
3 years	13.5	14.4	15.6	17.0	18.2
3y 3m	13.4	14.3	15.5	16.9	18.1
3y 6m	13.3	14.2	15.4	16.8	18.0
3y 9m	13.2	14.2	15.4	16.8	18.0
4 years	13.2	14.1	15.3	16.7	18.0
4y 3m	13.1	14.0	15.3	16.7	18.0
4y 6m	13.1	14.0	15.3	16.7	18.0
4y 9m	13.0	14.0	15.2	16.7	18.0
5 years	13.0	13.9	15.2	16.7	18.1
5y 6m	13.1	14.0	15.3	16.7	18.1
6 years	13.2	14.0	15.3	16.8	18.3
6y 6m	13.2	14.1	15.4	16.9	18.5
7 years	13.3	14.2	15.5	17.1	18.8
7y 6m	13.3	14.3	15.6	17.3	19.0
8 years	13.4	14.4	15.7	17.5	19.4
8y 6m	13.5	14.5	15.9	17.7	19.7
9 years	13.6	14.6	16.0	18.0	20.1
9y 6m	13.7	14.7	16.2	18.3	20.5
10 years	13.9	14.9	16.4	18.6	21.0
10y 6m	14.0	15.1	16.7	18.9	21.5
11 years	14.2	15.3	16.9	19.3	22.0
11y 6m	14.4	15.5	17.2	19.6	22.5
12 years	14.6	15.7	17.5	20.1	23.1
12y 6m	14.8	16.0	17.9	20.5	23.6
13 years	15.1	16.3	18.2	20.9	24.2
13y 6m	15.4	16.6	18.6	21.4	24.8
14 years	15.6	16.9	19.0	21.9	25.3
14y 6m	15.9	17.3	19.4	22.4	25.8
15 years	16.2	17.6	19.8	22.8	26.4
15y 6m	16.4	17.9	20.1	23.2	26.8
16 years	16.7	18.2	20.5	23.7	27.3
16y 6m	16.9	18.5	20.8	24.0	27.7
17 years	17.1	18.7	21.1	24.4	28.0
17y 6m	17.3	18.9	21.4	24.7	28.4
18 years	17.5	19.2	21.7	25.0	28.6
18y 6m	17.6	19.4	22.0	25.3	28.9
19 years	17.8	19.5	22.2	25.6	29.1

Age in years runs along the bottom and BMI（kg/m²） up the side. The five lines are, from the bottom, the 3rd, 15th, 50th, 85th and 97th percentiles, ranging from 11.3 to 29.1. The full figures are in the table above.

Japan percentile curves for BMI, boy.

girl

Japan · BMI, girl（kg/m²）
Age	P3	P15	P50	P85	P97
0 months	11.2	12.1	13.3	14.7	15.9
1 months	12.1	13.2	14.6	16.1	17.3
2 months	13.2	14.3	15.8	17.4	18.8
3 months	13.7	14.9	16.4	18.0	19.4
4 months	14.0	15.2	16.7	18.3	19.8
5 months	14.2	15.3	16.8	18.5	20.0
6 months	14.3	15.4	16.9	18.6	20.1
7 months	14.3	15.4	16.9	18.6	20.1
8 months	14.3	15.4	16.8	18.5	20.0
9 months	14.2	15.3	16.7	18.4	19.9
10 months	14.1	15.2	16.6	18.2	19.7
11 months	14.0	15.1	16.5	18.1	19.6
12 months	13.9	15.0	16.4	17.9	19.4
13 months	13.8	14.8	16.2	17.8	19.2
14 months	13.7	14.7	16.1	17.7	19.1
15 months	13.7	14.6	16.0	17.5	19.0
16 months	13.6	14.6	15.9	17.4	18.8
17 months	13.5	14.5	15.8	17.3	18.7
18 months	13.4	14.4	15.7	17.2	18.6
19 months	13.4	14.3	15.7	17.2	18.5
20 months	13.3	14.3	15.6	17.1	18.5
21 months	13.3	14.2	15.5	17.0	18.4
22 months	13.3	14.2	15.5	17.0	18.3
23 months	13.2	14.2	15.4	16.9	18.3
2 years	13.3	14.3	15.5	17.0	18.4
2y 3m	13.4	14.3	15.6	17.1	18.4
2y 6m	13.3	14.3	15.5	17.0	18.3
2y 9m	13.3	14.2	15.5	16.9	18.3
3 years	13.2	14.1	15.4	16.9	18.2
3y 3m	13.1	14.1	15.3	16.8	18.2
3y 6m	13.1	14.0	15.3	16.8	18.2
3y 9m	13.0	14.0	15.3	16.8	18.3
4 years	12.9	13.9	15.3	16.8	18.3
4y 3m	12.9	13.9	15.3	16.8	18.4
4y 6m	12.9	13.9	15.3	16.9	18.4
4y 9m	12.8	13.8	15.3	16.9	18.5
5 years	12.8	13.8	15.3	17.0	18.6
5y 6m	12.8	13.8	15.2	17.0	18.7
6 years	12.8	13.8	15.3	17.1	18.9
6y 6m	12.8	13.8	15.3	17.2	19.2
7 years	12.9	13.9	15.4	17.4	19.4
7y 6m	12.9	14.0	15.5	17.6	19.8
8 years	13.0	14.1	15.7	17.8	20.2
8y 6m	13.1	14.2	15.9	18.1	20.6
9 years	13.3	14.4	16.1	18.4	21.1
9y 6m	13.4	14.6	16.3	18.8	21.6
10 years	13.6	14.8	16.6	19.1	22.1
10y 6m	13.8	15.0	16.9	19.5	22.6
11 years	14.0	15.3	17.2	20.0	23.2
11y 6m	14.3	15.6	17.6	20.4	23.8
12 years	14.6	15.9	18.0	20.9	24.4
12y 6m	14.8	16.2	18.4	21.4	25.0
13 years	15.1	16.5	18.8	21.9	25.6
13y 6m	15.4	16.9	19.2	22.4	26.1
14 years	15.6	17.2	19.6	22.9	26.7
14y 6m	15.9	17.4	19.9	23.3	27.1
15 years	16.1	17.7	20.2	23.7	27.6
15y 6m	16.2	17.9	20.5	24.0	27.9
16 years	16.4	18.1	20.7	24.2	28.2
16y 6m	16.5	18.2	20.9	24.5	28.4
17 years	16.6	18.3	21.0	24.7	28.6
17y 6m	16.6	18.4	21.2	24.8	28.8
18 years	16.7	18.5	21.3	24.9	28.9
18y 6m	16.7	18.5	21.3	25.0	29.0
19 years	16.7	18.6	21.4	25.1	29.0

Age in years runs along the bottom and BMI（kg/m²） up the side. The five lines are, from the bottom, the 3rd, 15th, 50th, 85th and 97th percentiles, ranging from 11.2 to 29. The full figures are in the table above.

Japan percentile curves for BMI, girl.

About this table

The figures come from the government survey itself — the 2023 Infant and Toddler Growth Survey published through e-Stat — rather than from the paediatric endocrine society’s charts, which are drawn from the 2000 survey.
The survey covers birth to 6 years, and head circumference only to 3. Japan publishes school-age figures separately, but as means without a percentile distribution, so nothing above 6 years can be read from them. WHO covers that range here instead.
Japanese practice judges thinness and heaviness by himando — a percentage above or below a standard weight for a given height — rather than by BMI category. There is no Japanese BMI table to read against, so the BMI on this page comes from WHO.