Southeast Asian studies (SEAS) refers to research and education on the language, culture, and history of the different states and ethnic groups of Southeast Asia. Some institutions refer to this discipline as ASEAN Studies since most of the countries that they study belong to the Association of Southeast Asian Nations or ASEAN. Definitions of what constitutes Southeast Asia differ between scholars, which blurs the boundaries between Southeast Asian studies and other regional studies like Oriental studies and post-colonial studies. Southeast Asian studies incorporates anthropology, religious studies, linguistics, and international relations.
The boundaries of Southeast Asia are contested due to historical, cultural, and linguistic similarities between some groups in Southeast Asia and neighboring regions like India and China. Many scholars of Southeast Asian studies rely on the Association of Southeast Asian Nations (ASEAN) to create a concrete list of nations that fit under the umbrella of Southeast Asia. As of 2016, members of ASEAN include Brunei Darussalam, Cambodia, Indonesia, Lao DPR, Malaysia, Myanmar, Philippines, Singapore, Thailand, and Vietnam.
While the term "Southeast Asia" was first used in connection with the present region by American priest and educator Howard Malcom in 1837, the region presently referred to as Southeast Asia was split between India and the Far East by anglophone scholars prior to the Second World War and de-emphasized as an area of study due to the presence of national interests in the region. Initial inquiries into the culture and traditions of Southeast Asia were primarily conducted by German and Austrian scholars who had greater access to the region because their home countries had no colonies in the region The strategic importance of numerous locales in Southeast Asia such as the Dutch East Indies and the Philippines during the Second World War attracted increased attention from the West. This newfound attention led to the establishment of Mountbatten's South-East Asia Commant (SEAC) in 1943, and the publication of the first map of Southeast Asia by the National Geographic society in 1944.