Mika has that traditional Japanese beauty. She really makes a kimono look so good on her. I think Kumi did rank so high because she has her own line and she wears kimonos more frequently. Most of Kumi's kimonos are nice but her kouhaku performance... well the kimono style wasn't very classy

But I can see why she did so well.
Ayu looks good in them but she really doesn't wear kimonos so much. She seems to prefer western outfits anyway