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About the Environmental Specimen Time Capsule Building

  In the Environmental Specimen Time Capsule Building, somatic cells, germ cells (e.g., sperm, eggs, and fertilized eggs), and tissues of endangered species are cryopreserved as genetic resources. Cryopreservation of genetic resources, the so-called genetic resource bank, is one of the options for ex situ conservation activities.

In addition, genetic resources are used for research activities such as reproductive biology, genetic diversity evaluation, bioresource development, and infectious disease ecology.

Method for cryopreservation of cells and tissues as genetic resources


A veterinarian conducts a postmortem examination to investigate the cause of death. Infectious diseases, such as avian influenza, tularemia, leptospirosis, and brucellosis are the most important components of the examination.


When we confirmed that the bodies are free of pathogens, cell culture and tissue sampling are conducted for cryopreservation.


The cultured cells and tissues are packed in storage tubes.


The tubes are transferred to storage tanks, and the inside temperature of the tank is maintained at −165 ℃ with liquid nitrogen vapor.

Examples of species preserving cells and tissues

Japanese crested ibis
Nipponia nippon

Okinawa rail
Gallirallus okinawae

Tsushima leopard cat
Prionailurus bengalensis euptilurus

Harbor seal
Phoca vitulina

Ryukyu long-haired rat
Diplothrix legata

Ryukyu Robin
Luscinia komadori namiyei

Japanese wood pigeon
Columba janthina janthina

Steller's sea eagle
Haliaeetus pelagicus

Oriental stork
Ciconia boyciana