"Nikko has had a busy few years, investing into its investment teams and the local product line-up, which includes some strong global strategies."
Douglas said Nikko had focused on investor engagement and transparency.
"These traits led to a great experience for their investors, solidifying Nikko's case as the outstanding fund manager of 2017," he said.
Nikko Asset Management is one of Asia's largest asset managers. Morningstar is a leading provider of independent investment research.
Other award winners
• Fund Manager of the Year: Fixed Interest Category - Russell Investments Global Fixed Interest.
•Fund Manager of the Year: Domestic Equities Category – Harbour Australasian Equity
• Manager of the Year: International Equities Category - T. Rowe Price Global Equity Growth
• Fund Manager of the Year: KiwiSaver Category – Milford Asset Management.