Machiko Aizawa is a former badminton

Badminton

Badminton is a racquet sport played by either two opposing players or two opposing pairs , who take positions on opposite halves of a rectangular court that is divided by a net. Players score points by striking a shuttlecock with their racquet so that it passes over the net and lands in their...

 player from Japan who won Japanese national and major international titles from the late 1960s to the mid-1970s. Though highly competitive in singles, her greatest success came in women's doubles with Etsuko Takenaka Toganoo

Etsuko Toganoo

is a retired Japanese badminton player noted for her consistency and impassive demeanor, who won numerous international titles during the 1970s...

. They shared the prestigious All-England Championships

All England Open Badminton Championships

The All England Open Badminton Championships, or simply All England, is one of the world's oldest and most prestigious badminton tournaments. Played annually, it developed after the success of world's first badminton tournament held in Guildford in 1898...

 in 1972, 1973, and 1975. They won the Danish Open

Denmark Open

The Denmark Open, or formerly known as Danish Open, is an annual badminton tournament held in Denmark and organized by Danmarks Badminton Forbund.- History :...

 women's doubles title in 1970 and 1974, the quadrennial Asian Games

Asian Games

The Asian Games, officially known as Asiad, is a multi-sport event held every four years among athletes from all over Asia. The Games were regulated by the Asian Games Federation from the first Games in New Delhi, India, until the 1978 Games. Since the 1982 Games they have been organised by the...

 championship in 1970, and the U.S. Open

U.S. Open Badminton Championships

The U.S. Open Badminton Championships is an annual badminton tournament first held in 1954 when the American Badminton Association opened the U.S. National Badminton Championships to foreign competition. For the full list of winners see List of U.S. Open Badminton champions.-21st century:-External...

 women's doubles title, on their only try, in 1970. Aizawa played on Japan's 1972 Uber Cup

Uber Cup

The Uber Cup, sometimes called the World Team Championships for Women, is a major international badminton competition contested by women's national badminton teams. First held in 1956-1957 and contested at three year intervals, it has been contested every two years since 1984 when its scheduled...

(women's international) team which retained the world championship, and its 1975 team which lost the title to Indonesia.