Inter Milan defender Yuto Nagatomo insists the stamina-draining conditions that await Japan in Brazil at the World Cup finals will not diminish his performance. He said Friday that dealing with the heat is a psychological battle before it is a physical one.

Nagatomo said he was happy to be at Japan's training camp in a "fantastic environment" by the beach in Florida, and also that he would be able to take part in full training later in the day after recovering from a bruised leg.

"The weather is hot here and the humidity levels are high but this is what I have been told it will be like in Brazil and I want to get properly accustomed to it," said Nagatomo, a day after the squad arrived in the United States.