Tokyo Olympic golf host remains uncertain

The club scheduled to host the golf at the Tokyo 2020 Olympic Games must allow women to have full membership or organisers will have to find another venue, International Olympic Committee (IOC) vice president John Coates told Reuters on Monday.

The private Kasumigaseki Country Club in Saitama prefecture, which is set to host both men's and women's tournaments in July and August 2020, forbids women from playing on Sundays and excludes them from becoming full members.

Coates, who is head of the coordination commission which oversees preparations for the Games, said he had only become aware of the issue on his last visit to Tokyo at the end of last year and that organisers were now aware of the IOC's stance.

"We made quite clear that there has to be gender equality," Coates told Reuters in an interview at the Asian Winter Games in the northern city of Sapporo.

"If they can't achieve the gender equality then we have to get another course, but the organisers are very confident that they will," the Australian added.

Japanese media reported that members of the club had met on Sunday to hear an explanation of the situation. The club was closed on Monday and nobody was available to comment.

Coates said he was aware that discussions were underway.

"They either will or they won't," he said. "There's plenty of time to move to another golf course if we have to."

Tokyo 2020 organisers unveiled a revised budget of $US16.8 billion ($A21.9 billion) in December and vowed to seek further savings in cooperation with the IOC.

Coates said the budget issue should be resolved some time this year and the final figure would be nowhere near the 3.0 trillion yen ($A34.51 billion) that a Tokyo city government panel forecast last year.

"The costs that were being speculated were vastly over-speculated," he said.

"We haven't yet accepted a final budget. (It should be worked out) on this forthcoming visit or the one after."