First of all, Japan began to advocate the improvement of the national physique in the 1960s and 1970s. It can be seen from some video materials at that meeting that some extreme kindergartens even organized children to run in little yellow hats and underwear in early winter.
Of course, people with clean noses are everywhere. ...
Therefore, the Japanese are very cold-resistant, but because of this, the Japanese like to soak in hot springs and take a bath. Therefore, for the skin, the alternation of hot and cold has played an unknown role in the quality of the skin. There are even so-called alternating hot and cold baths. On the one hand, it is to enhance physical fitness, on the other hand, it is also to promote skin metabolism and slow down skin aging.
Secondly, Japanese people eat healthier food than China, because they eat more seafood, which is high in protein. Foods such as jellyfish, sea cucumbers, octopus, squid and even seaweed are rich in gum, which is also very beneficial to the skin.
Finally, look at people. There are many Japanese hybrids, and the Japanese themselves belong to the yellow race. Due to the problems of World War II, there were many mixed-race Americans stationed in Japan (there were many such literary works in the 1950s and 1960s, and before that, there was Madame Butterfly).
Up to now, there has been a second generation or even a third generation, which has greatly improved their native genes. Most common hybrids have both white skin color and Asian pore density (white people have large pores). So it looks like the skin will be fine.
In addition, makeup artists and hydraulic massage are very popular in Japan. Many stars, even actresses in the makeup industry, have their own makeup artists and maintenance agencies, which will do regular maintenance. Some actresses even engage in this business because they have no money to do maintenance (some ridiculous? )