Japan will pour $30 billion (27 billion euros) in investment in Africa by 2018, including $10 billion in infrastructure development, Prime Minister Shinzo Abe said on Saturday at a summit in Nairobi.

"When combined with the investment from the private sector I expect the total real amount to be $30 billion," Abe said at the opening of the Tokyo International Conference on African Development, where he will meet dozens of leaders from across Africa.