The International Council for Standardization in Hematology(ICSH) is a non-governmental and non-profit body devoting to standardization work on hematology tests. It has publicized over 100 standardization documents on the subjects in the past 30 years. The ICSH is currently extending its activities to cooperative work with WHO, CEN, NCCLS, ICTH, ISBT, IFCC and ISLH. ICSH-Asia has also been founded to discuss local issues on standardization in hematology among Asian countries.