What is the average BMI in Japan?

23.7 for men and 21.8 for women, with standard deviations of 4.0 and 4.1. Averaged across the sexes that is 22.8, against a global figure of 24.6.

What share of adults in Japan are overweight or obese?

Our estimate from the mean and SD: 37% of men have a BMI of 25 or more, and 6% are at 30 or more. For women it is 22% and 2%. These assume a normal curve, so the true obesity shares are likely a few points higher.

Is a BMI of 25 high in Japan?

A BMI of 25 is the WHO line between healthy weight and overweight. In Japan it is higher than about 63% of men and 78% of women. For men here that is above the median, so it reads as slimmer than most.

How does Japan compare with Mozambique?

Men in Mozambique average 22.1 against 23.7 in Japan; women 23.5 against 21.8. Mozambique ranks 166th, Japan 167th.

Average BMI in Japan

Men in Japan have an average BMI of 23.7, women 21.8. Both means fall in the WHO healthy weight band for men and healthy weight for women. That puts Japan 167th of 186 countries in our data, ranked from highest BMI to lowest.

Key numbers

Men

23.7

Healthy weight

Women

21.8

Healthy weight

SD, men / women

4.0 / 4.1

vs global mean

-0.8

women -3.0

Rank

167 of 186

1 = highest BMI

Est. obese

6% / 2%

men / women, BMI 30+

Estimated share in each WHO category

Estimated from mean and SD with a normal curve, not surveyed shares
Category	BMI	Men	Women
Underweight	under 18.5	10%	21%
Healthy weight	18.5 to 25	53%	57%
Overweight	25 to 30	31%	19%
Obese	30 and over	6%	2%

Columns may not sum to 100 because of rounding. Real BMI distributions have a longer right tail than a normal curve, so the obese share here is probably a few points low.

Japan among its neighbours

Ranking neighbours (three above and below) plus every Asia country in our data
#	Country	Men	Women	Both	Region
5	Kuwait	29.2	30.7	29.9	Asia
9	Qatar	28.9	30.4	29.6	Asia
10	Jordan	28.5	30.1	29.3	Asia
12	Palestine	28.3	30.0	29.1	Asia
14	Iraq	28.0	29.9	28.9	Asia
15	United Arab Emirates	28.2	29.6	28.9	Asia
16	Saudi Arabia	28.1	29.5	28.8	Asia
18	Syria	27.6	29.5	28.6	Asia
29	Lebanon	28.1	27.6	27.9	Asia
31	Georgia	27.7	27.9	27.8	Asia
39	Israel	27.8	27.1	27.5	Asia
44	Brunei	27.3	27.3	27.3	Asia
50	Azerbaijan	26.2	28.2	27.2	Asia
54	Uzbekistan	26.5	27.7	27.1	Asia
71	Kyrgyzstan	26.1	27.4	26.8	Asia
74	Turkmenistan	26.7	26.8	26.8	Asia
83	Kazakhstan	26.5	26.7	26.6	Asia
87	Oman	26.5	26.5	26.5	Asia
89	Mongolia	26.1	26.8	26.5	Asia
91	Armenia	25.7	27.2	26.4	Asia
94	Iran	25.4	27.3	26.4	Asia
99	Tajikistan	26.0	26.5	26.3	Asia
105	Malaysia	25.4	26.3	25.9	Asia
110	Maldives	24.8	26.6	25.7	Asia
123	Bahrain	24.9	24.8	24.9	Asia
127	Thailand	24.0	25.1	24.6	Asia
129	Taiwan	25.1	23.8	24.5	Asia
132	Hong Kong	24.6	23.9	24.3	Asia
133	North Korea	24.4	24.1	24.3	Asia
138	Bhutan	23.6	24.6	24.1	Asia
139	Pakistan	23.4	24.8	24.1	Asia
141	China	24.3	23.6	24.0	Asia
142	Yemen	23.7	24.2	23.9	Asia
144	South Korea	24.5	23.2	23.9	Asia
146	Singapore	24.4	23.1	23.8	Asia
150	Afghanistan	22.7	24.2	23.4	Asia
156	Indonesia	22.6	23.9	23.3	Asia
157	Philippines	22.9	23.6	23.3	Asia
159	Sri Lanka	22.6	23.8	23.2	Asia
162	Laos	22.8	23.2	23.0	Asia
164	Central African Republic	22.1	23.8	23.0	Africa
165	Malawi	22.6	23.3	23.0	Africa
166	Mozambique	22.1	23.5	22.8	Africa
167	Japan	23.7	21.8	22.8	Asia
168	Myanmar	22.3	23.2	22.8	Asia
169	Sierra Leone	21.9	23.6	22.8	Africa
170	Zambia	21.4	23.8	22.6	Africa
171	Nepal	22.6	22.5	22.6	Asia
173	Cambodia	22.2	22.4	22.3	Asia
179	Vietnam	22.0	21.9	21.9	Asia
180	India	21.8	22.0	21.9	Asia
181	Bangladesh	21.4	22.1	21.8	Asia
183	Timor-Leste	21.4	21.4	21.4	Asia

What a given BMI means in Japan

Share of adults with a lower BMI than each value, estimated from mean and SD
BMI	WHO band	Lower, men	Lower, women
20.0	Healthy weight	18%	33%
22.5	Healthy weight	38%	57%
25.0	Overweight	63%	78%
27.5	Overweight	83%	92%
30.0	Obese	94%	98%
32.5	Obese	99%	>99%
35.0	Obese	>99%	>99%

Read it as: a man with BMI 30 in Japan has a higher BMI than 94% of men. Values under 1% or over 99% are shown as <1 and >99.

In plain language

The standard deviation for men in Japan is 4.0. About two thirds of men have a BMI between 19.7 and 27.7; for women the middle two thirds run from 17.7 to 25.9. Compared with the global mean, men here are 0.8 points lower and women 3.0 points lower.

BMI does not distinguish muscle from fat, and the WHO bands were set on European populations. For South and East Asian populations the same BMI carries more health risk, which is why several countries there use 23 and 27.5 as their own cut-offs.

Questions

What is the average BMI in Japan?: 23.7 for men and 21.8 for women, with standard deviations of 4.0 and 4.1. Averaged across the sexes that is 22.8, against a global figure of 24.6.
What share of adults in Japan are overweight or obese?: Our estimate from the mean and SD: 37% of men have a BMI of 25 or more, and 6% are at 30 or more. For women it is 22% and 2%. These assume a normal curve, so the true obesity shares are likely a few points higher.
Is a BMI of 25 high in Japan?: A BMI of 25 is the WHO line between healthy weight and overweight. In Japan it is higher than about 63% of men and 78% of women. For men here that is above the median, so it reads as slimmer than most.
How does Japan compare with Mozambique?: Men in Mozambique average 22.1 against 23.7 in Japan; women 23.5 against 21.8. Mozambique ranks 166th, Japan 167th.

Source: NCD Risk Factor Collaboration, Lancet 2017, age-standardised mean BMI for 2016. Percentiles on this page are our estimate from a normal distribution with the stated mean and SD.

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🇯🇵Average BMI in Japan