Found a Japan Times article on this.
http://www.japantimes.co.jp/text/nn20130115a2.html
Quoting some paragraphs.
Okinawa center offers respite for Fukushima kids
A center set up on Kumejima Island in Okinawa is providing active recovery support for children affected by the nuclear crisis in Fukushima Prefecture.
Kumi No Sato, some 100 km west of Naha, Okinawa's capital, was set up by the nonprofit organization Okinawa Kumi No Sato after the nuclear crisis began in March 2011 as a way to help disaster-afflicted children in Fukushima stay healthy.
The facility, which opened last July, is modeled after a recuperation center in Belarus set up in 1994 for child victims of the 1986 Chernobyl nuclear accident. Photojournalist Ryuichi Hirokawa, 69, who helped run the center, is using his experience there to manage Kumi No Sato.