Answers to Q7,Q8

There will be an economic boost for sure but there will be a decrease after the Olympics.
Long waited news had arrived at Japan from the other side of the globe. 2020 Olympic games will be held in Tokyo, Japan. Critics had lost their tongue suddenly and all people seemed to be happy. If you search its economic effect of Tokyo Olympic with Google, you'll get over 11 million results. Major newspapers and TV broadcasters show favor. You may find good opportunity to do business in Japan.
Followings are some of points that opposing economists accused often.

1. Like Nagano Winter Olympic, local government will have budget deficits.
2. 300-billion-yen-effects is only 0.5% of Japanese GDP.
3. Using existing facilities, which is the one of the Tokyo Olympic concept, will reduce investment.
4. It effects only psychologically.

Citation
Tokyo Olympic Games, Retrived July 21 2016