Buddhism was located in Southeast Asia and East Asia. These regions are known for their strong Buddhist traditions and have a significant Buddhist population. Buddhism spread from its birthplace in India to other parts of Asia, including Southeast and East Asia, through trade routes and missionary activities. Countries such as Thailand, Cambodia, Laos, Vietnam, China, Japan, and Korea have embraced Buddhism and have rich Buddhist cultural and religious practices. Therefore, Southeast Asia and East Asia are the correct locations for Buddhism.