The Japanese Rugby Football Union announced that next month's Asia Sevens Invitational, which was to double as a test event for rugby sevens at the 2020 Games, has been cancelled due to concerns over the spreading of the deadly virus.
Organisers are now hoping to reschedule the rugby sevens test event at some stage when the situation is more safe.
Rugby sevens made its Olympics debut at the last Games at Rio 2016.
