The decision has been made due to the strict travel restrictions that prevail over large parts of the world and the fact that Japan is trying to keep the spread of infection down.
The competition was an important test ahead of the summer games in Tokyo, which will be inaugurated on July 23.
The International Gymnastics Federation (FIG) writes in a statement that the organizer of Tokyo 2020 will hold an alternative national test event on May 4.
CLIP: The Olympic director's statement in 60 seconds
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Now Mori is forced to resign. Photo: TT News Agency