World IQ Map · country report
Average IQ in Japan
27,658 people in Japan took the same 20-question IQ test as everyone else on the map. Japan ranks #3 of 53 countries.
108.3relative score
#3of 53
27,658people tested
+8.3vs world average (100)
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Where Japan sits
9095100 avg105110115120
#2
Australia109.1
#3
Japan108.3
#4Japan108.3
New Zealand108.2
People who took the test in Japanese scored higher than people from Japan who took it in another language — 108.4 vs 105.2 (27,424 vs 234 people). That is most likely a translation or localization effect, not a claim about anyone's ability — see the method page for the full country-by-country breakdown.
100 is the average score of everyone who has taken the test since 2026-07-15, and 15 points is one standard deviation. People choose to take the test online, so this shows how Japan's test-takers scored — it is not an official national measurement.
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