But that has not stopped the strife-ridden, largely desert country of 17 million people adding its voice to a growing diplomatic chorus that Beijing says supports its rejection of an international tribunal hearing on the waters.
Others apparently singing from the same hymn sheet include Togo, Afghanistan and Burundi.
They are among the latest foot soldiers in "a public relations war" by China aimed at questioning international maritime rules, said Ashley Townshend, a research fellow at the United States Studies Centre at the University of Sydney.
Niger joined the ranks of "over 40 countries that have officially endorsed China's position" that the issues should be settled through direct negotiations, not international courts, said Chinese foreign ministry spokeswoman Hua Chunying.
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That, she added, was just the start: "There will be more and more countries and organisations supporting China."
Similar announcements have become an almost daily ritual at China's foreign ministry media briefings, as it steels itself for what is widely expected to be an unfavourable ruling by the tribunal that could come within weeks.
But it is also a party to the UN Convention on the Law of the Sea.
Manila accuses Beijing of flouting the convention and has called for the tribunal, set up in 1899, to rule on the row.
Beijing insists that the court does not have jurisdiction, arguing that any claims to the contrary are politically motivated, and has boycotted the proceedings.
"By cobbling together a group of nations that share its views, Beijing's aim is to show that there is a genuine debate over the legality of the Philippines' legal challenge," Townshend said.
Despite requests by AFP the foreign ministry in Beijing did not provide a full list of China's backers on the issue.