TOKYO: Olympic host cities must make an “unwavering commitment” to achieving a successful Games, the International Olympic Committee (IOC) urged on Monday, as cost overruns plague the run-up to Tokyo’s 2020 event. In a video message to a debriefing in Tokyo on the Rio Olympics, IOC chief Thomas Bach hailed them as “marvellous games” held in a “marvellous city.” “Organising the Olympic Games is an intensive process that requires creativity, discipline and collaboration with many people and stakeholders,” he said. “Most importantly, it requires unwavering commitment.” The three-day debriefing has drawn senior officials from the IOC and Olympic organisers from Rio and Tokyo as well as hosts of the Winter Games in 2018, South Korea’s Pyeongchang, and 2022, which are being held in Beijing. Among other participants were Tokyo governor Yuriko Koike and Rio de Janeiro mayor Eduardo Paes. Koike, now spearheading a cost-cutting fight, told the meeting that she wants to learn from Rio, where she said materials for some facilities were recycled to build a school. “We want to introduce the spirit of ‘what a waste,’ to organising the Games,” Koike said. The debriefing came as negotiations over options for moving some Tokyo 2020 venues intensified.