Jpop Female singers with The Best Vocal Register ?

[sweetgirl]

I'm not familiar with music terminologies, but you want powerful, big voices and what no, then these are my recommendation:
- bright: http://www.youtube.com/watch?v=RXdA2XWwF6A
http://www.youtube.com/watch?v=INMdKFklUfY

- Mai Fukui: http://www.youtube.com/watch?v=TwM9444II2o
http://www.youtube.com/watch?v=9uEajVxn6hg

- Miho Fukuhara: http://www.youtube.com/watch?v=FSxSTLpu1iQ
http://www.youtube.com/watch?v=WuaEUYS5HcU

- EMYLI: http://www.youtube.com/watch?v=VMIiC1d9Exc
http://www.youtube.com/watch?v=eLWDdp3wVU0