Chamaecyparis, common names cypress or false cypress (to distinguish it from related cypresses), is a genus of conifers in the cypress family Cupressaceae, native to eastern Asia (Japan + Taiwan) and to the western and eastern margins of the United States. The name is derived from the Greek "khamai", meaning ground, and "kuparissos" for cypress.

Based on the paragraph above can we conclude that "Chamaecyparis are not common outside of Asia and the western and eastern margins of the United States."?
It's impossible to say