By Zjan Shirinian

Original plans were for the Wakasu Olympic Marina to host sailing events during the Tokyo 2020 Games ©Getty ImagesThe sailing venue for the Tokyo 2020 Olympics could be moved as part of a widening review into original plans for the Games.

Competition is due to take place at the Wakasu Olympic Marina, but according to reports, the fact it is within the approach zone for one of Haneda Airport's runways could derail those plans.

That is because helicopters will need to fly above the venue to film the races, disrupting flights at the country's busiest airport.

With the building of the marina in Tokyo's Kota Ward on ice, Japanese newspaper The Yomiuri Shimbun says the metropolitan Government is now looking at the possibility of moving the sailing competition to Inage Yacht Harbor in Mihama Ward, Chiba - further along Tokyo Bay.

According to Tokyo 2020's bid document, building the new marina would cost JPY¥9.2 billion (£52.1 million/$87.8 million/€65.7 million) and there are questions about how well used it would be after the Games.

Inage Yacht Harbor opened in 1982 and is around 25 kilometres from the planned site for the Athletes' Village.

The International Sailing Federation said it understands there are "several options" for the sailing competition at Tokyo 2020.

Secretary general Jerome Pels told insidethegames: "We haven't had any formal proposals of changes but we know that they are looking at their plans.

"We need to find out exactly why they want to make the changes [but] so far we haven't been asked to look at anything.

"Tokyo are not really sure what they want to do."

He added: "Our venues are not just about construction, the filed of play is in a natural environment so we would need to look at that - everything from currents, depth, whether we're sailing close to the shore line."

Sailing is the fourth sport to have its proposed venue reviewed by officials ©Tokyo 2020Sailing is the fourth sport to have its proposed venue reviewed by officials ©Tokyo 2020

In June, Tokyo 2020 officials were warned any changes to venues will only be allowed to be made with the full support of the relevant world governing body.

Aside from a possible change in sailing venue, plans to construct a canoe slalom course in Kasai Rinkai Park on reclaimed land are being reviewed.

Basketball and badminton could also be moved to existing sites instead of being staged at newly built venues on a waterfront area near the Olympic Village.

John Coates, chairman of the International Olympic Committee's Coordination Commission, spoke during June's visit of plans to relocate the canoe slalom course.

"This is consistent with President [Thomas] Bach's 2020 Working Agenda that we want to see venues that are sustainable and have legacy," he said.

"We want to see the use of more existing venues.

"We want to see the use of more temporary venues."

The sailing venue review is reportedly being coordinated by the metropolitan Government, with the relevant sports federation officials in Japan and overseas to be consulted.