The Philippines beat Singapore in two straight matches to clinch the Asia Rugby Championship Division 1 title, the first since 2012.
The Volcanoes, who hosted Singapore at Southern Plains in Calamba, Laguna, first topped the visitors on Friday before wrapping up their campaign with another victory on Tuesday.
The Philippines (56th) is ranked two places below Singapore in the world standings.
The Volcanoes finished third in last year's Division 1 competition.
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