The preparations have been hit by cost-cutting measures
The dust may only be settling on the 2016 Olympic and Paralympic Games, but it looks like Tokyo 2020 organisers are already facing venue troubles with the Games just under four years away.
According to the Associated Press, "the venues being reviewed are those for volleyball, swimming, rowing and canoe sprint, Kyodo news agency reported".
The idea was the brainchild of Tokyo Governor Yuriko Koike, who hopes using existing venues will help keep the costs low of hosting the Games in July, August and September 2016.
Sports such as basketball, taekwondo and cycling have already been moved outside of Tokyo to cut costs. The cycling was moved to Izu, around 120 kilometres away from Tokyo. That's the equivalent distance of Longford hosting the cycling if Dublin hosted the Games.
Since being awarded the Games, Tokyo have struggled to cope with the costs of hosting, especially in recent years. Last year, plans to redevelop the National Stadium were cut back due to public outcry over high costs.
The backlash effected the 2019 Rugby World Cup, with plans to host games in the stadium now cancelled.