[Standardization of laboratory medicine in Japan].

In this review, we summarize the standpoint of the Japanese Committee for Clinical Laboratory Standards (JCCLS) regarding the preparation of standard materials. The JCCLS cooperates with the Japan Association of Clinical Reagents Industries (JACRI), National Metrology Institute of Japan (NMIJ, AIST), and the Joint Committee for Traceability in Laboratory Medicine (JCTLM).