Most NGK plugs sold in the U.S. are made here in the U.S. (West Virginia) but they also get imported and exported around the world. There are NGK plugs made in China. That also means there are knock-off NGK plugs sold out of China. Actual NGK plugs from China are still decent quality as they are built to the same standards as any other NGK plug. The knock-offs are the problem, and they can be hard to distinguish sometimes.