Inter Milan defender Maicon was named Man of the Match after opening the scoring in the 55th minute and Elano doubled the advantage in the 72nd as Brazil jumped atop the group with their win in Johannesburg.
Ji Yun Nam scored a consolation goal in the 89th minute for the North Koreans, who were making their second World Cup appearance.
Portugal and Ivory Coast had played to a 0-0 draw earlier in the day in the other Group G match.
The night game in cold Johannesburg marked the return of North Korea to the World Cup for the first time since 1966, when they shocked Italy in reaching the quarter-finals.
The South American giants controlled the match early and the first chance went to Galatasaray midfielder Elano, who shot wide left after seven minutes.
Dunga’s men however were unable to work through the stingy North Korea defence. And the Asians eventually began winning a bit of possession.
Defender Cha Jong Hyok ventured forward at the 17-minute mark and shot well wide left. But it showed that the North Koreans were not afraid to push forward if they have an opportunity.
The Asians had the first corner of the contest in the 32nd minute and enjoyed better build-up though they lacked the precision with the final pass.
The Selecao continued to dominate the ball after the break and had a fine position for a free kick in the 51st but Bastos hammered the ball just left from 18 yards. And Robinho’s blast from nearly the same spot also went wide left two minutes later.
Elano sent Maicon down the right side of the area and the Inter Milan star blasted a swerving shot on goal from just short of the touchline.
Luis Fabiano was close to ending his scoring drought – he hasn’t found the back of the net in his last five matches – but the Sevilla striker shot over the bar from near distance in the 63rd minute.
The South Americans seemed satisfied with the result but North Korean pulled a goal back in the 89th minute. A long ball left of goal was headed by Jong Tae Se back towards Ji, who found room before beating Julio Cesar with a left foot shot.
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