Stating one's political view in public is not allowed for show biz people in Japan: it is an unwritten rule of the industry. Thus her action was so brave that she might lose some of her business. Actually, Taro Yamamoto, who was a famous actor, shared his anti-nuclear view after the Great Earth Quake in 2011 via Twitter and his weblog and lost most of his business in the industry.
I hope that many Japanese famous people follow her to break an atmosphere covering Japan: an atmosphere that talking political issue is "weird." Most Japanese people are reluctant to talk political issues even in private spaces, so usually the discussions on important political issue aren't deepen among general public. As a consequence of it, politicians and bureaucrats often tell lies without any shame, as seen many times in the course of development of nuclear policy and... in the bid of 2020 Olympic Games.
Fujiwara breaks TV taboo, slams secrets bill
The Japan TImes SEP 18, 2013http://www.japantimes.co.jp/news/2013/09/18/national/fujiwara-breaks-tv-taboo-slams-secrets-bill/#.UjqbBdIwmFA