Tokyo 2020 unveiled a budget of between ¥1.6 trillion (£11 billion/$13.6 billion/€13.1 billion) and ¥1.8 trillion (£12.4 billion/$15.3 billion/€14.7 billion) last month.

The official cost estimate, revealed during a Four-Party Political Working Group meeting, was down from the maximum budget cap of ¥2 trillion (£13.8 billion/$17 billion/€16.4 billion) cited by Tokyo 2020 President Yoshirō Mori in November.

Concerns have been raised by local Governments in Japan, with reports 10 wrote to Koike last month urging her not to backtrack on a promise made by the Metropolitan Government in 2013, over the cost burden they may have to shoulder, regarding the construction of temporary facilities for the Games.

The policy said the Organising Committee for the Games should bear the brunt of the costs for building temporary venues.

A recommendation had been made by the task force appointed by Koike, which warned in September that drastic changes must be taken to avoid the budget ballooning to ¥3 trillion (£20.7billion/$25.5 billion/€24.5 billion), that the local and Municipal Governments could help pay for temporary venues.

It is expected that the issue will be a key part of the talks between Abe and Koike, as they seek to determine the exact share parties would be required to take up.

A meeting between Japan’s Olympic minister Tamayo Marukawa, Koike and Tokyo 2020 President Yoshiro Mori is also expected to take place later this month.

"We need to kick off with a summit talk in order to reach an agreement as early as possible," Tokyo 2020 chief executive Toshiro Muto told Kyodo news.

Tokyo 2020 have sought to play down concerns over spiralling costs in recent months, although the Task Force report sparked further fears when they proposed venues for four sports - swimming, rowing, canoeing and volleyball - be moved to address the issue.

An alternative aquatics centre and a rowing and canoe sprint venue 400 kilometres away at Tome in Miyagi Prefecture were each rejected in favour of downscaled versions of existing plans for new venues in Tokyo - the Olympic Aquatics Stadium and Sea Forest course respectively.

Tokyo Governor Yuriko Koike then announced that plans to stage volleyball at an existing venue in Yokohama had been scrapped in favour of the original proposal of building a new facility in Tokyo Bay.

The Ariake Arena was put forward in the initial plans and was confirmed as the venue for the sport at Tokyo 2020 by Koike in December.