Tokyo faces many problems about the preparation of Tokyo Olimpic such as building arena, place to play and expenditure for the representatives in lots of countries. However, the most one is about Marathon. At first, the sport was going to be held in Tokyo and the city had ready to accept it and spend 30 billions yen on preparing the road. However, IOC(International Olympic Commitee) made a dicision to hold the race in Hokkaido all of sudden. The reason why IOC considered the tempriture in that the runner runs in hard summer in Tokyo. IOC worries about one problem in the past. In Doha, many runners suffered from the high temperiture and withdraw from the race. That is why marathon doesn’t be held in Tokyo. However, while this consideration has high respectation in the world, there are a lot of complaints in Japan. That is about ticket or from many players who estimated the race held in Tokyo. Moreover, many people have to get airlines ticket to go Hokkaido. Marathon is one of the most popular sports in Olimpic, so there are deep concerns for the success of this event.