Japan grew to become the final member of the Group of Seven main industrialised nations to start its vaccination drive towards COVID-19 on Feb 17.
It has to this point obtained three shipments of vaccine developed by Pfizer Inc and BioNTech, comprising round 1.4 million pictures.
The Pfizer/BioNTech vaccine needs to be saved at a temperature of round minus 75 Celsius (minus 103 Fahrenheit).
A medical establishment reported that the freezer malfunction had occurred over the weekend, rendering 172 vials of the vaccine, or 1,032 doses, ineffective, the ministry mentioned.
It declined to determine the title of the medical establishment or the producer of the freezer in query, however mentioned the freezer maker would begin trying into the reason for the malfunction.