A floating pontoon as a public fishing park is seen in this aerial view in Shimizu, Japan, Saturday, April 2, 2011. Shimizu city authority offered the pontoon, known as "Mega Float," to Tokyo Electric Power Co. ,(TEPCO) to help store highly contaminated stagnant water at the compound of the Fukushima Dai-Ichi nuclear power plant which was damaged by the March 11 earthquake-triggered tsunami.