Walking through the city on a weekend, you sometimes notice a quiet sense of dissonance.
The young people from China and South Korea you see at airports or tourist spots somehow look noticeably taller.
Is it just an illusion?
Apparently not. Statistically speaking, the average height of young people in China and South Korea has risen significantly over the past 30 to 40 years.
Japan, meanwhile, has remained almost flat since the 1990s.
Why has such a difference emerged within the same region of East Asia?
