i think when one wears yohji, to a certain extent, one shoul forego the use of a mirror. we get to analytical in front of mirrors i believe which works against the freedom one should feel in his clothes. if you force yourself to not look at a mirror i think it'd change your focus from 'how do i look in what im wearing' to 'how do i feel in what im wearing'.
thats my take on the above
I do admire this notion. However I don't see anything wrong with feeling good wearing his clothes and looking good at the same time, the two should go hand in hand. If Yohji does want to advocate his philosophy this way, and this way only, he will have to order his flagship stores to do without any mirrors whatsoever.
I did notice you said " to a certain extent " so I am with you on it, to a certain extent