Mika Hashikai, 37, mourns for her mother and father, victims of the March 11, 2011 earthquake and tsunami, in Rikuzentakata, Iwate Prefecture, northeastern Japan, Sunday, March 11, 2012. On Sunday, Japan marks the one-year anniversary of the March 11 earthquake and tsunami that triggered a nuclear crisis.(AP Photo/Itsuo Inouye)

A family cries at the site where their house, destroyed in last year's earthquake and tsunami, once stood, in Minamisanriku, Miyagi prefecture, Japan, Sunday, March 11, 2012. With moments of silence and prayers, Japan on Sunday was remembering the massive earthquake and tsunami that struck the nation one year ago, killing just over 19,000 people and unleashing the world's worst nuclear crisis in a quarter century. (AP Photo/Shizuo Kambayashi)

A woman kneels near a pile of debris while offering prayers in the earthquake and tsunami devastated city of Rikuzentakata, Iwate prefecture, northeastern Japan, Sunday, March 11, 2012. Japan on Sunday was remembering the massive earthquake and tsunami that struck the nation one year ago, killing just over 19,000 people and unleashing the world's worst nuclear crisis in a quarter century. (AP Photo/Koji Sasahara)

A costumed protester stands outside a Tokyo Electric Power Company building during an anti-nuclear demonstration marking the first anniversary of last year's massive earthquake and tsunami which unleashed the world's worst nuclear crisis in a quarter century, in Tokyo, Sunday, March 11, 2012. (AP Photo/Junji Kurokawa)

A family offers prayers at a makeshift shrine in a neighborhood devastated by a tsunami in Natori, Miyagi Prefecture, northern Japan, Saturday, March 10, 2012 on the eve of the first anniversary of the disaster. (AP Photo/Shizuo Kambayashi)

A woman weeps during a moment of silence to pay tribute to those who lost their lives in the March 11, 2011 earthquake and tsunami in Tokyo, Sunday, March 11, 2012. Through silence and prayers Sunday, people across Japan remembered the massive earthquake and tsunami that struck the nation one year ago, killing just over 19,000 people and unleashing the world's worst nuclear crisis in a quarter century. (AP Photo/Junji Kurokawa)