Why is it culturally acceptable in Japan and Korea to wear extremely short pants or mini skirts, but not to show a little bit of cleavage?

Why is it culturally acceptable in Japan and Korea to wear extremely short pants or mini skirts, but not to show a little bit of cleavage?

NOT acceptable...



Why is it culturally acceptable in Japan and Korea to wear extremely short pants or mini skirts, but not to show a little bit of cleavage?
Acceptable...

Updates
+1 y
To those who say Asian women don't have big breasts - do you have to have big breasts to want some air on your chest/cleavage when it's really hot outside?
Why is it culturally acceptable in Japan and Korea to wear extremely short pants or mini skirts, but not to show a little bit of cleavage?
Post Opinion