The report is incorrect.
Koreans should be surely longer than Japs/Indians/Ethnic Chinese...............
Also Both Central China and Northern China PRCs will be longer than sporeans and hongkongers becos it is already medically recorded the Northern chinese are phsically better endowed and larger than the southern chinese.
The japs should be the shortest.
I agree NE Asia mainland should be longer, eg Northern China or Mongolia. Even North Korea is longer based on the website. However, please bear in mind that North Koreans near the Liaoning area are really like another breed from the South Koreans. As such, S.Korea is definitely shorter than N.Korea, just like Northern China vs Southern China.
In terms of shortness, Indochina and some parts of India should appx the same length as Japanese.