Of much importance in terms of biological diversity/resource sustainability is the preservation of not only the diversity of species, but also of diversity within species. Endangered species generally live in fragile environments and, oftentimes, harbor precious genetic resources. The preservation of species and genetic diversity, together with research making use of such cells and genes, makes it possible to—indeed, is necessary for—maintaining biological diversity. In this research, we work to advance international standardization of avian cell culturing and cryogenic preservation techniques developed in Japan and, simultaneously, to promote the stable cryogenic preservation of avian species in Asia and Far East Eurasia. We establish a framework for the cellular preservation of rare wild birds together with a framework for the development of tools/techniques for utilizing such samples, including an international cell preservation network and international standardization. And, in conjunction, we also work towards an international standardization of preservation techniques, including those useful for inspections/quarantines of avian influenza and other infectious diseases. This work is carried out in collaboration with core research institutions with Thailand, South Korea, Russia, and other countries.