The total number of Games-related COVID infections has risen to 67 with the addition of nine more cases to the official list.
As hectic efforts were on to contain Japan's worst atomic crisis, police in protective gear on Thursday for the first time launched a search for tsunami victims in a 10-km zone around a radiation-leaking nuclear plant while Premier Naoto Kan vowed to rebuild the nation amid growing opposition calls for him to quit.
Dozens of Japanese towns have abandoned plans to host Olympic athletes because of concern they will overburden stretched medical resources amid a fourth wave of coronavirus infections.
The head of a Japanese doctors' union warned on Tuesday that holding the Olympic Games in Tokyo this summer, with tens of thousands of people from around the world, could lead to the emergence of an "Olympic" strain of the coronavirus.
The quake struck on Tuesday morning at about 06:00 local time (2:30 am IST on Tuesday), the Japan Meteorological Agency said, adding that the epicentre of the quake, which was felt in Tokyo, was off the coast of Fukushima prefecture at a depth of about 25km, the agency said.
Despite the recent imposition of import rule and high duties, the yellow metal continues to attract buyers.