Kawakami Tomoko passed away at 16:45 on 09 June 2011.

Kawakami Tomoko, born on 25 April in Tokyo, debuted as a seiyuu in
1994, and has since voiced many lead roles in many anime.  Here are a
few of them :
Tenjou Utena - Shoujo Kakumei Utena
Shindou Hikaru - Hakaru no go
Hinata Fuyuki - Keroro Gunsou
Kamio Misuzu - Air

She fell sick in August 2008, and was hospitalized in the same month
and had a surgery performed 3 days afterward.   Due to her sickness,
she had been replaced by other seiyuu for all of her roles.   She did
manage to do some seiyuu work occasionally in the past few years.

Ref : notice from Production Baobab
http://baobab.dreamlog.jp/archives/4981754.html

-- 
'CuSO4' Yung