Japanese are on number one. (Japan also spends the highest amount per person on education.) While average IQ of the country is 105 as shown in the map, 10% of the Japanese have an IQ of 130 or more, and the people born in 1960-61 in Japan have minimum IQ of 115. Compared to this in America (US) the people having an IQ of 130 or more are not even 2% of the population!
Intelligence quotient (Wikipedia)