NHK has learned that the Tokyo Metropolitan Government is expected to pay the largest portion of additional costs for next year's Olympics and Paralympics.
The extra spending is due to be shared by the metropolitan government, the central government, and the Games' organizing committee.
A leadership race is underway among Japan's opposition ranks. Two of the largest opposition parties are set to merge next week, when a lawmaker from one of the two groups is named its head.
Nearly 150 members of the Diet have registered to join the new political party, including more than 100 in the Lower House. This means it will have nearly as many Lower House seats as its precursor, the Democratic Party of Japan, just before the party took power 11 years ago.
Economic analysts are expecting Japan to post growth for its gross domestic product in the July-September period despite a historic downturn in the previous quarter.
Japan's Cabinet Office announced on Monday that GDP shrank at an annualized 27.8 percent in real terms in the April-June period compared with the previous quarter.
The Tokyo Metropolitan Government says it has confirmed 60 new cases of coronavirus in the capital on Sunday. The figure is the largest since the state of emergency was lifted on May 25 in the capital.
Tokyo authorities say the infected people are in their teens to their 70s, with some ranging as high as 90 years and older. They add that people in their 20s and 30s account for three out of four of the newly confirmed cases.
Japan confirmed 169 additional coronavirus infections on Sunday, the second largest single-day count following the 200 recorded on the previous day.
The country has seen 1,893 cases, excluding 712 from the Diamond Princess cruise ship, which was quarantined at Yokohama Port south of Tokyo.
Japanese health authorities say more than 80 people have been confirmed to be infected with the coronavirus on Sunday so far, bringing Japan's total to over 1,800.
A low pressure system and a cold air mass brought unseasonal snow to Tokyo on Sunday.