The Southeast Asian Frontier (SEAF) #1: Highlands took place at the Department of Communication, Universitas Islam Indonesia (UII), Yogyakarta, from 18-20 August 2022. The workshop, held in a hybrid format, featured 30 selected participants chosen from nearly 60 abstract submissions. These participants represented institutions from 11 different countries, including China, Finland, France, Germany, Indonesia, Malaysia, Sweden, the Netherlands, the United Kingdom, the Philippines, and the United States of America. The selection process prioritized Ph.D. students and early career scholars/researchers. The 30 abstracts covered a range of scholarly disciplines: anthropology, archaeology, architecture, biology, communication, forestry, geography, history, literature, philology, and sociology.