The Asia-Pacific Blood and Marrow Transplantation Group (APBMT) is an international organization which is involved in hematological stem cell transplantation, sharing their information and cooperating with basic and clinical research in Asia-Pacific countries. It was initiated by transplant physicians from China, Hong Kong, India, Indonesia, Japan, Korea, Malaysia, Taiwan, Thailand and Australia/New Zealand in 1990. They held early APBMT meetings in China and Japan from 1990 to 1994. Since then, the plenary meetings have been held 14 times in the past 19 years and they have been held annually since 2004 (refer to the Annual Meetings). In 2000, APBMT planned to have transplantation-case registry system as a symbol of the unity of the group and initiated APBMT Registry (consisted of annual Activity Survey and annual Outcome Registration) in 2006. By this moment, the annual Activity Surveys were performed three times and you can see their results through our home page as well as in our report-booklets. In 2006, APBMT established the own structures to keep and to expand its activity, which are consisted of Executive Board, Scientific Committee, Regular Members, Supporting Members, Tentative Attendees and the Secretarial Office/Data Center (located in Japan). In 2009, APBMT fixed the bylaws and also confirmed that APBMT was one of founding members of Worldwide Network for Blood and Marrow Transplantation (WBMT). APBMT is now comprised of 21 countries/regions (Australia, Bangladesh, Cambodia, China, Hong Kong, India, Indonesia, Iran, Japan, Korea, Malaysia, Mongolia, Myanmar, New Zealand, Pakistan, Philippine, Singapore, Sri Lanka, Taiwan, Thailand,and Vietnam), and is expanding its activities through annual congress (Australia in 2011, India in 2012, Vietnam in 2013, China in 2014, Japan in 2015, and Singapore in 2016) , registration system and working groups under the collaboration with the member societies of WBMT.