International Standardization in Hydrogen Technology is a key factor for realizing the Hydrogen Economy in the near future.ISO/TC197 (International Standardization Organization/Technical Committee 197, Hydrogen Technology) has 15 Working Group (WG) and its activities have been greatly activated in recent years.This is probably because hydrogen-related products are expected to distribute in commerce couple with the commercialization of fuel cells.To date, nine international standards (ISs) have been published and seven ISs are under development.At present, Japan is acting as conveners in two WGs out of the eight.Japan is also preparing the submission of New Work Item Proposal (NWIP) on hydrogen dispenser components and its peripheral equipments for hydrogen fueling stations.Other countries such as Canada and China also have declared to submit NWIP on several items.Further NWIP submission from Japan is desired to promote the profitable business for Japan.