After more than six years in Brooklyn, Pok Pok Ny will be closing on Sept. 2, according to the chef and restaurateur Andy Ricker, who also has six restaurants in Portland, Ore.

Mr. Ricker cited several reasons for the decision: The restaurant’s lease came up for renewal. And though the landlord was willing to negotiate, Mr. Ricker said, it didn’t make sense in the face of decreasing revenues and rising expenses. His general manager, Valerie Dozier, is switching careers to film and leaving the restaurant. And, the Columbia Street waterfront district, the restaurant’s neighborhood, has not become “a hub of activity despite years of positive predictions,” as he put it.

He says he also feels that, compared with when he first opened Pok Pok Ny, the city’s Thai food scene has developed nicely, with places like Uncle Boons, Somtum Der and Ugly Baby, making his restaurant one of many. (Pete Wells, reviewing Pok Pok Ny for The New York Times, awarded the restaurant two stars in 2012.)