Who do you think to be the most influential japanese female solo acts from 1990-2014?

[Surreal17]

This is a topic that really interests me for a while and I decided to make a special thread for it. So, I'd like to know who are the most 10 influential (that added/brought something new to the music/fashion/image) japanese female solos?
Period of time - 1990 - 2014


My guesses are:

Chara (whisper voice vocal technique + experimental sound; influence for a lot of solo acts such as Shiina Ringo and Bonnie Pink; million seller in the 90's)
YUKI (leader vocalist of Judy & Mary - The band is known for their innovative punk, rock, and pop meldings of noisy but melodic music in the 1990s; million seller within the band)
Bonnie Pink (I do not know much about her but I heard she's a great musician of japan - not sure if she's considered influential or not)
Namie Amuro (fashion monster; million seller in 90's and 00's)
Hamasaki Ayumi (poignant & sincere lyrics with very often artistic changes + fashion monster + best selling japanese female solo)
Shiina Ringo (an ecletic/experimental image and sound; million seller in the 90's & 00's)
Utada Hikaru (brought to the mainstream attention the rnb style; most influential artist of the 00's named by japan times + best selling japanese album)


So, what's your choices and why?

edit: I'll return later with a more elaborate answer