(190311) -- IWATE, March 11, 2019 (Xinhua) -- Photo taken on March 11, 2019 shows a pine tree in front of a reconstructed dam in Rikuzentakata of Iwate Prefecture, Japan. Ceremonies were held across Japan on Monday to mark the eighth anniversary of a powerful earthquake-triggered tsunami, which obliterated swathes of the nation's northeastern seaboard and triggered the worst nuclear crisis since the 1986 Chernobyl disaster. (Xinhua/Ma Caoran)