CAPE TOWN :Bank of Japan Governor Kazuo Ueda on Thursday warned of "very strong" uncertainty on the global economic outlook that required vigilance in setting monetary policy. Speaking after attending the Group of 20 finance leaders' meeting in South Africa, Ueda said many members appeared to share the view there was uncertainty over how U.S. tariff policies could unfold, and how such moves could affect their economies. "There is very strong uncertainty on the U.S. policy outlook, including on