From Tokyo 2020, “100 facts to know about Japan and the Olympics that will make you seem like the smartest person in the room.
Part 1: From the dates of the Olympic Games to the number of islands in Japan
Part 2: From outdoor handball matches to judo medals
Part 3: From Tokyo Aquatics Centre to Lebron James”
From Tokyo 2020, About the  Olympic Games:
The Tokyo 1964 Olympic Games
“On October 10, 1964, the Games of the XVIII Olympiad began with the Opening Ceremony at Kasumigaoka National Stadium. 5,133 athletes from 93 nations and regions demonstrated their exceptional abilities in 163 events across 20 sporting competitions. It was the first ever Olympic Games held in Asia and an enormous success. In conjunction with this momentous event, Tokyo experienced dramatic developments in its post-war infrastructure, including the construction of the Metropolitan Expressway and the Tokaido Shinkansen railway (‘the bullet train’). This type of major progress in the capital served as a stepping stone for an era of rapid economic growth in Japan, demonstrating its miraculous restoration to the world.
Achievements of the 1964 Games
“The 1964 Games not only served as a driving force of urban development and economic growth, its role in promoting sport in Japan must not be overlooked. Sport became an integral part of Japanese people's lives, with the popularity of football leading to the creation of the national league, and sport clubs emerging across the country.”
Source: U.S. Census Bureau, International Data Base (demographic data) and USA Trade Online (trade data); Central Intelligence Agency, The World Fact Book (country reference maps).
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From Census.gov > Our Surveys & Programs > International Programs:
Note: After you create an account, you can search for imports and exports of commodities in a specified geographic area of interest, such as Japan. For more information, see the Quick Start Guide. USATrade Online does not provide direct links to the data.