With a POD after 1800 (so barring outlandish scenarios of Chinese and Japanese colonialism in the Americas, not that these aren't interesting, they're just not the purpose of this thread) have and independent country in the American continent have (due to massive immigration) an East Asian majority population.
Suriname, for example, has an Indian plurality even though it was colonized by Europeans. What I'm looking for is basically a similar scenario but with East Asians instead of Indians.
Where might that be possible?