Yesterday, I bought a pair of "five separated socks". I like these socks, so I wear them everyday.
Now, in Japan, the popularity of "five separated socks" has been increasing (at least, I think so). These socks are very suitable for Japanese weather because the air has a lot of humidity.
Once a person has learned their comfortableness, he/she can't help stopping to wear them, I think.
I have heard that a well known Japanese musician "Sakamoto Ryuich" said he wears them for his health.
If you have never worn them, I recommend you to try them.