Chief Cabinet Secretary turns down Sudanese official’s call for Japan to invest in Sudan. Japan said Wednesday that Sudan was too dangerous for investment by Asia's largest economy after a Khartoum official sought investment and played down the bloodshed in Darfur. Nafie Ali Nafie, a top aide to Sudanese President Omar al-Beshir, is visiting Tokyo as part of preparations for a conference on African development Japan plans to host in May.