JADA, founded in 2001 and overseen by Japan's Ministry of Education, Culture, Sports, Science and Technology, have signed a Memorandum of Understanding with Tokyo 2020.

The agreement will allow Tokyo 2020 to exchange know-how with JADA and benefit from their anti-doping experience, which Tokyo 2020 claim will help "deliver a Games where athletes can compete on a level playing field, at the same time protecting and developing the integrity of sport".

JADA will provide operational support and management of the command centre and doping control stations at venues during the Games, as well as the evaluation and certification and training of doping control officers and chaperones, who will be recruited by Tokyo 2020. 

Tokyo 2020 will be responsible for the preparation and implementation of sample collection during the Games and the determination of the overall testing plan and procedures.

It is expected that sample analysis during Tokyo 2020 will take place at the World Anti-Doping Agency (WADA)-accredited laboratory in the city. 

A report by the Japanese Sports Agency panel published last November had warned that the country was in urgent need of more trained laboratory analysts.

According to the report, improved human and physical resources are required to handle the expected number of 6,500 drug tests during the Games.

It was claimed that there were only 15 analysts at LSI Medience Corp., the only WADA-accredited laboratory in Japan.

A specimen analysis report takes up to 10 days under the current system but must be completed in 24 hours during Tokyo 2020.

This requires an operation of around 200 officers rotating in shifts around the clock.

Tokyo 2020 had told insidethegames at the time that Japan had already started recruiting new staff. 

Tokyo 1964, the last time the Olympics were staged in the Japanese capital, was the last occasion there was no drugs testing in the Summer Games.

Random drugs testing was introduced for the following Summer Olympics, in Mexico City in 1968. 

Much of the groundwork, though, was laid for the introduction of proper drugs-testing at the World Sports Science Congress held during Tokyo 1964. 

The 1998 Winter Olympics in Nagano was also notable for the last occasion there was no positive drugs tests at the Games.

Canadian snowboarder Ross Rebagliati, winner of the men's giant slalom, was initially disqualified and stripped of his gold medal after testing positive for marijuana.

Marijuana was not then on the list of prohibited substances by the International Olympic Committee (IOC) and their decision was reversed by the Court of Arbitration for Sport and Rebagliati's medal reinstated.

Japan's outstanding record on doping was a major contributing factor in Tokyo being awarded the 2020 Olympic and Paralympic Games by the IOC at its Session in Buenos Aires three years ago. 

They beat Istanbul and Madrid, whose countries Turkey and Spain have among the worst doping records in sport.

The only major names to have tested positive for banned performance-enhancing drugs are marathon runner Izumi Maki and volleyball player Kana Ōno.

Maki, who finished 12th in the 1992 and 1996 Olympic Games in Barcelona and Atlanta respectively, tested positive after wining the Sapporo Half Marathon in 1995 for a stimulant and was suspended for three months. 

Ōno, a member of Japan's national volleyball team, was suspended for two months in 2015 after a sample of hers was found positive for stmulant Tulobuterol.

Since being awarded the Olympic and Paralympic Games, Japanese officials have also been investigating whether to make doping a criminal offence in the country.