Olympic chiefs have given Tokyo 2020 organizers a vote of confidence, despite a series of missteps that have mired the upcoming games in controversy.

Preparations for the Tokyo Games suffered a heavy blow in July when Prime Minister Shinzo Abe scrapped the design of the showpiece National Stadium over ballooning costs, followed closely by embarrassing accusations of plagiarism, which forced organizers to withdraw the event's logo in September.

But International Olympic Committee Vice President John Coates told reporters Wednesday that the IOC was satisfied with the organizers' efforts, as the governing body wrapped up its fourth review of preparations on a two-day visit.