A French is swimming across the Pacific Ocean from Japan to the USA. Ben Lecomte, 51, set off on Tuesday. It will take six months to swim the 9,000km. He will swim for eight a day. There will be many , like sharks, storms, seas, and cold water. He will also have to fight exhaustion, and injuries. Lecomte said the part was most . He said: "You have to...always think about positive."
Lecomte trained his and mind for six years for this . He swam in the sea every . He is in top physical . He needs to be mentally strong. He is doing the swim to raise of climate change, and the effects of rubbish and the Fukushima disaster on the ocean. Scientists will check his to see how so much exercise affects the . In 1998, he swam across the Atlantic. After , he said: "Never again."