More consideration must be given to how the one venue still to be decided for Tokyo 2020 is due to host wheelchair basketball finals and Olympic volleyball matches, the President of the Japanese Paralympic Committee (JPC) has warned.
It comes as a Four Party Working Group continues to assess whether to stick with existing plans to build the new Ariake Arena on Tokyo Bay or move to an existing facility in Yokohama.
Yasushi Yamawaki, who is also a Governing Board member of the International Paralympic Committee (IPC), has warned here that a detailed analysis must be undertaken to assess whether the Yokohama Arena option has adequate wheelchair accessibility.
He said the suitability of the venue itself must be considered as well as the road leading up to it.
"My question is whether they thought about the needs of the Paralympics [when considering moving the venue]," Yamawaki told insidethegames.
"Neither the JPC nor the Japan Wheelchair Basketball Federation was consulted."
The Yokohama option was recommended by a Task Force commissioned by Tokyo Governor Yuriko Koike in October in a bid to cut costs.
Four-party representatives from the International Olympic Committee (IOC), Tokyo 2020 and both the Japanese National and Tokyo Metropolitan Governments (TMG) scrapped plans to consider alternative venues for swimming and rowing and canoe sprint during a meeting on Tuesday (November 29).
But they postponed a decision on the final venue and are now hoping to reach a verdict by December 24.
Yamawaki does not necessarily think the Yokohama venue would not be suitable to host wheelchair basketball medal matches, but believes cost-adding renovation work is likely to be required.
He claims the Musashino Forest Sport Centre due to host preliminary wheelchair basketball games would be too small to host the final.
The International Volleyball Federation have also called for organisers to press ahead with Ariake Arena plans.
IOC Coordination Commission chairman John Coates said today that 35 criteria will be considered before a decision is made.
An IOC technical panel visited Yokohama, which lies 40 kilometres to the south of Tokyo, yesterday to consider its feasibility.
It is thought they are also concerned with the small sized space proposed for broadcasting as well as the need to purchase land close to the stadium for services associated with the Games.
This could reduce the cost benefit of moving there, while abandoning the Ariake plan could lead to a loss of post-Games legacy.
Koike, however, is thought to be keen to press ahead with the move, especially to after her two other suggestions were rejected.
The alternative aquatics centre and a rowing and canoe sprint venue 400km away at Tome in Miyagi Prefecture were each rejected in favour of downscaled versions of existing plans for new venues - the Olympic Aquatics Stadium and Sea Forest course respectively.
"It's easy to gather reasons why we can't hold events somewhere, but I want to continue pursuing reasons why we can," she said.
There was clear tension between Koike and Tokyo 2020 President Yoshirō Mori over this and other issues during the meeting on Tuesday.
But Coates has denied that this personal feud could lead to wider problems.
“I’m confident that Governor Koike and President Mori and the two organisations that they lead can work together,” he said.
“We sat around a table the other day and we all agreed on two venues and we all agreed that we would postpone a final decision until more investigation was made on a third venue.”