Mori Art Museum (Roppongi Hills Tower 53F) will hold the Great East Japan Earthquake Charity Art Sale on 16 and 17 April. This sale features a total of about twenty works by world widely known twenty artists including Yoko Ono.

For more detail, see the official website: http://moriartmuseum.cocolog-nifty.com/blog/2011/04/the-great-east.html