Question: What is the official name of this major international multi-sport event where various sporting events will take place at New National Stadium (新国立競技場 )?

Context articles: New National Stadium (Tokyo)
2016 WTA 125K series
Sports analyst
List of multi-sport events
2018 Winter Olympics
International Military Sports Council
2020 Summer Olympics
1948 Summer Olympics medal table
2012 Summer Olympics
2012 Summer Paralympics

New National Stadium (新国立競技場 ) is a multi-purpose stadium under construction in Kasumigaoka, Shinjuku, Tokyo, Japan.
 The stadium will serve as the main stadium for the opening and closing ceremonies, as well as being the venue for track and field events at the 2020 Summer Olympic Games.
The WTA 125K series is the secondary professional tennis circuit organised by the Women's Tennis Association.
 The 2016 WTA 125K series calendar consists of eight tournaments, each with a total prize fund of $125,000.
 After 2015, the Nanchang event was upgraded to a WTA International level tournament, and with new events starting in San Antonio, West Hempstead and Bol.
 The planned tournament in West Hempstead was then cancelled, and the tournament scheduled to take place in Carlsbad, California was moved to Oahu, Hawaii.
 Following the death of the Thai king Bhumibol Abdulyadej, the event due to take place in Hua Hin was also cancelled, in accordance with Thai tradition that sporting events cannot take place in the month after a monarch's death.
In sports broadcasting, a sports analyst provides expert discussion of sports-related topics before, during, or after a sporting event.
 Sports analysts are frequently former athletes who participated in the sport being analyzed.
 A sports analyst is different from a sports commentator in that sports commentators provide a running commentary regarding a sporting event while the event is taking place, whereas sports analysts usually provide commentary about sporting events which have yet to take place or which have already concluded.
 The job of the color commentator is a hybrid of the two styles, providing expert analysis of a sporting event while the sporting event is taking place.
A multi-sport event is an organized sporting event, often held over multiple days, featuring competition in many different sports between organized teams of athletes from (mostly) nation-states.
 Events are typically held over a few days to accommodate the large number of events held, often more than those in single-sport competitions.
 The first major, modern, multi-sport event of international significance was the modern Olympic Games.
 Some of the most recognised sporting events in the world today are multi-sport events — the World Games, the Commonwealth Games, the Pan American Games and the Mediterranean Games — among others.
 This article lists all major multi-sport events, whether defunct or functioning, in the modern day.
 A full listing of all major multi-sport events is provided in the table below.
The 2018 Winter Olympics, officially known as the XXIII Olympic Winter Games (French: Les "XXIIIeme Jeux olympiques d'hiver"; Hangul: 평창 동계 올림픽 ; RR: "Pyeongchang Donggye Ollimpik " ), and commonly known as PyeongChang 2018, ] is a major international multi-sport event scheduled to take place from 9 to 25 February 2018 in Pyeongchang County, South Korea.
The International Military Sports Council (IMSC) or Conseil International du Sport Militaire (CISM), established 1948, is one of the largest multidisciplinary organisations in the world.
 CISM is the second largest multi-sport discipline organization after the International Olympic Committee, holding more than 20 competitions annually.
 Soldiers, who may previously have met on the battlefield, now meet on the sports playing field.
 It organises various sporting events, including the Military World Games and World Military Championships for the armed forces of 134 member countries.
 The aim of CISM is to promote sport activity and physical education between armed forces as a means to foster world peace.
 The motto of CISM is "Friendship through Sport" and is based on three pillars of sport, education and solidarity.
 This is in accordance with the philosophy and the ideals which were set in CISM’s mission statement in 1998, signed by all the member countries.
The 2020 Summer Olympics, officially known as the Games of the XXXII Olympiad and commonly known as Tokyo 2020, is a major international multi-sport event due to be celebrated in the tradition of the Olympic Games as governed by the International Olympic Committee (IOC).
The 1948 Summer Olympics (also known as the Games of the XIV Olympiad) was an international multi-sport event held from July 29 through August 14, 1948, in London, United Kingdom.
 It was the first Olympic Games to take place in twelve years, due to the Second World War (and was known informally as "The Austerity Games" - largely due to countries having to bring their own food due to shortages in Britain), with London being chosen as the host city in March 1946.
 London had previously hosted the 1908 Summer Olympics, and was due to have hosted the event in 1944.
 A record 59 nations were represented by 4,104 athletes, 3,714 men and 385 women, in 19 sport disciplines.
 Following the Second World War, Germany and Japan remained under military occupation and had not yet formed their National Olympic Committee, and so were not invited.
 The only major Axis power to take part in the Games was Italy.
 The Soviet Union also did not form a National Olympic Committee and was ineligible to be invited to compete.
 However, they did send observers and competed in the 1952 Summer Olympics.
 Following the threats of a boycott from Arab countries should an Israeli team fly their flag at the opening ceremony, the International Olympic Committee (IOC) excluded Israel from the Games on a technicality.
The 2012 Summer Olympics, formally the Games of the XXX Olympiad and commonly known as London 2012, was a major international multi-sport event celebrated in the tradition of the Olympic Games, as governed by the International Olympic Committee (IOC).
 It took place in London and to a lesser extent across the United Kingdom from 25 July to 12 August 2012.
 The first event, the group stage in women's football began on 25 July at the Millennium Stadium in Cardiff, followed by the opening ceremonies on 27 July.
 10,768 athletes from 204 National Olympic Committees (NOCs) participated.
The 2012 Summer Paralympics, the 14th Summer Paralympic Games, and also more generally known as the London 2012 Paralympic Games, were a major international multi-sport event for athletes with disabilities governed by the International Paralympic Committee (IPC), that took place in London, United Kingdom from 29 August to 9 September 2012.
 These Paralympics were one of the largest multi-sport events ever held in the United Kingdom after the 2012 Summer Olympics, and were the largest Paralympics ever: 4,302 athletes from 164 National Paralympic Committees participated, with fourteen countries appearing in the Paralympics for the first time ever.
 A total of 503 events in 20 sports were held during these games; for the first time since their suspension after the 2000 Paralympics, events for the intellectually disabled were also held in selected sports.