When asked in Japan's players need to have more of an edge when playing tougher teams, Zaccheroni said he has tried to get the Japanese players to take advantage of their unique strengths.
"Japanese culture is different," he said. "When we play teams from South America or Europe we understand those players play a different way, with an edge, so instead of asking my players to be meaner, I ask them to be smarter."
Japan surprised many at the 2010 World Cup by advancing past the group stage with wins over Cameroon and Denmark before losing on penalties to Paraguay in the knockout stage. Zaccheroni knows the expectations will be high for Brazil, but says it's important to keep things in perspective.
"We'll be in a place where there is 85 percent humidity and there will be a lot of travel," Zaccheroni said. "All we can do is to try to show other teams how good we are."
One of Japan's best players, forward Keisuke Honda has signed a 3 1/2-year contract with Zaccheroni's former team, AC Milan, and will join the club before the end of the year. Some have suggested Honda's transfer to the Italian team will hinder his World Cup preparations, but Zaccheroni doesn't see it that way.
"I know Honda very well," he said. "I know his mental and physical qualities and his character so I am sure it will be good for him to go there. He will be highly motivated there and I am sure he will be fine when our team gets together in May."