It is amazing that every Tokyo Metro and JR station has these free-standing mirrors. It is not uncommon to see men spend five minutes or more publicly adjusting their hair. Primping, fluffing, biggen’ing, slicking, and moving strands from one side to the other. I love how natural, unselfconscious and public all this male vanity is.
As my blog theme attests, there is a fine and delicious line between male vanity and delinquency. Male vanity is one of Tokyo’s most remarkable and unremarked features! In the photo above, it seems the four mirrors are there to accommodate rush hour grooming!
Tokyo Moe 
I love that you posted on the mirrors here because they are ubiquitous yet very easy to miss! You’ve got to admire the people who actually stop in front of them to groom themselves, I’ve been tempted but haven’t been able to overcome my irrational fear of grooming myself in an extremely public place!!!
Thanks, GEG, for the comment. The ever-present subway mirrors support the urban vanity I so love.