New Tokyo park 'built from tsunami debris' proposed The new Tokyo park proposals, put forward to the government by Hideki Matsuzaki, Mayor of Urayasu, are currently under consideration by the Ministry of the Environment, according to reports in the Mainichi. In addition to domestic disposal issues, tsunami debris is also increasingly on the international agenda, as vast floating islands of flotsam are starting to hit the west coast of the United States and Canada. The most recent arrival is a large floating dock, measuring 66 ft in length, 19 ft wide and 7 ft tall, that was discovered washed up on a beach in Oregon. The floating dock washed up on Agate Beach, Oregon (AFP/Getty Images) Made from concrete and Styrofoam, the dock has been identified by Japanese officials as originating from the tsunami-hit port of Misawa in Japan's northern Aomori prefecture. It is believed to be one of the biggest pieces of debris to have made landfall in the US since the Japanese disaster in March last year, with other high-profile items including a Harley-Davidson.