The earthquake struck at a depth of six miles in the sea east of Tokyo. Several journalists at the Tokyo 2020 Olympic Games reported feeling the aftershock of the magnitude 6 tremors.

       Mark Beretta, an Australian journalist described the feeling the aftershock while live on air for Sunrise.

       Mr Beretta said: "Welcome back to the Olympic city where we are currently in an earthquake, an earth tremor.

       "The roof above us is moving and you might notice our lights and camera are moving as well."

       He added: "That was quite an unusual moment, I have not been through an earthquake before.

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       "We're in a tower, which at home would be made of scaffolding, but here it is made of construction steel."

       It has been confirmed that there is no tsunami threat as a result of the earthquake.

       UN NERV tweeted: "Earthquake Detailed Report – 8/4.

       "At around 5:42am, an earthquake with a magnitude of 5.6 occurred offshore Ibaraki Prefecture at a depth of 30km."

       "The maximum intensity was 2.

       "There is no threat of a tsunami."

       Some of those based in Tokyo took to Twitter to discuss the earthquake.

       CNN's Will Ripley wrote: "Earthquake in Tokyo right now. I’ve felt the shaking for about 30 seconds. Still going."

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       NBC's Lester Holt tweeted: "I felt what appeared to be a mild earthquake here in Tokyo.

       "Around 5:33 am Wednesday morning here. Rolled for a good 20 seconds.

       "Interestingly my crew 3 floors below me felt nothing.

       "Japanese meteorological agency reporting 6.0 magnitude"