Methamphetamine is mainly produced in Mexico, Canada, and the Golden Triangle of Southeast Asia (border regions of Burma, Laos, and Thailand). It's also made in small local labs in the US or in larger facilities in California's Central Valley. Canadian labs distribute meth to the US and Japan. Methamphetamine in Southeast Asia travels to Taiwan, the Philippines, North Korea, and Australia.

https://recoverypartnernetwork.com/drug/illicit/meth-addiction/