The 4th Asian Seminar on Informatics will be held from March 3-6, 2013 in Vietnam and organized by Kyoto University, Hanoi University of Science and Technology, and Vietnam National University Hanoi. The seminar topics will include speech processing, image processing, natural language processing, signal processing, compressed sensing, security and data safe, and other informatics or applied mathematics topics. Participants are invited to submit 1-page abstracts in Latex or MS Word format by February 5, 2013 to hoinghitoantinbk@gmail.com. There are no fees for participants.