My sister-in-law is involved with a group that does a biannual student exchange event between prairie Canada and the Fujioka area of Japan. In odd years, Fujioka students come to Saskatchewan; in even years, the reverse occurs. This event normally happens at the beginning of August. The Saskatchewan students leave for Japan in very late July 2018 this year, to give you a sense of schedule. The duration of the visit is about two to three weeks.
The Tokyo Olympics of 2020 will be well underway at this time of year, ending on August 9. The event really has to happen in August, because it is a mutually-available window of opportunity between the schedules of the students in each country.
Currently the group is considering deferring the exchanges by a year to avoid the 2020 Olympic Games. My instinct is that there is an opportunity here. I think the group could still hold the exchange during the Olympic Games, since Tokyo is so large in context with the Games, and the students are only using Tokyo as a transition to a local train. However, it is likely that air fares will be significantly higher and that there could be additional security.
Conversely, I suspect that just after the Games, there may be an opportunity when flights to North America are cheaper (as they fly full with visitors returning home, and emptier with visitors going to Japan).
Understanding that anything we say is slightly speculative, in the context of prior Olympics, what would be your advice about the timing of this student visit? Does my theoretical opportunity exist? Is the effect of the Games on Tokyo likely to be so mild (are airlines likely to increase capacity to offset increased demand) that it really doesn't matter about timing? I speak principally of travel from Canada, but I suspect that long-distance travel from anywhere in the world is likely to be similarly affected, so feel free to answer in the context of similar events in the future, to help keep this question relevant going forward.