The International Judo Federation (IJF) has expressed the need to be "extra cautious" when planning events in Japan after cancelling the Tokyo Grand Slam.
The event was scheduled to take place from December 11 to 13 but has now been called off with organisers citing "continued uncertainty" surrounding the COVID-19 pandemic.
Tokyo dipped below 100 new coronavirus cases for the third straight day after registering 59 in the past 24 hours.
The Japanese capital is set to stage the Olympic and Paralympic Games next year with officials currently discussing COVID-19 countermeasures.
"In light of the continued uncertainty still existing around the Covid-19 pandemic, along with considering the fact that Japan is the hosting country of the Olympic Games, the IJF needs to be extra cautious when planning events in Japan," the IJF said in a statement.
"Therefore, it was decided to cancel the Tokyo Grand Slam, previously scheduled to take place in Japan this December.
"Given that there are already several IJF events, as well as many national competitions, which will take place from the beginning of 2021, it was agreed to cancel this Grand Slam, not postpone."
Despite the cancellation, the IJF is planning to organise the Zagreb Grand Prix, due to be held from October 30 to November 1.
The Budapest Grand Slam is also expected to go ahead from October 23 to 25, although the IJF is awaiting a decision from the Hungarian Government.
The IJF also confirmed Qatar would stage the World Judo Masters from January 11 to 13 2021.
"The most important role of the IJF, and in this situation particularly, is to protect our sport and our athletes," said IJF President Marius Vizer.
"In coordination with all stakeholders, we will continue to make everything possible to ensure the safety of all."