Machiko Aizawa

is a former badminton player from Japan who won Japanese national and major international titles from the late 1960s to the mid-1970s.

Though highly competitive in singles, Machiko's greatest success came in women's doubles with Etsuko Takenaka Toganoo. They shared the prestigious All-England Championships in 1972, 1973, and 1975. They won the Danish Open women's doubles title in 1970 and 1974, the quadrennial Asian Games championship in 1970, and the U.S. Open women's doubles title, on their only try, in 1970. Aizawa played on Japan's 1972 Uber Cup (women's international) team which retained the world championship, and its 1975 team which lost the title to Indonesia.

Achievements

Asian Games

Women's doubles

Year	Venue	Partner	Opponent	Score	Result
1970	Kittikachorn Stadium, Bangkok, Thailand	Template:Flagicon Etsuko Takenaka	Template:Flagicon Retno Kustijah Template:Flagicon Nurhaena	15–11, 15–6	Gold Gold

International tournaments (7 titles, 3 runners-up)

Women's doubles

Year	Tournament	Partner	Opponent	Score	Result
1968	Malaysia Open	Template:Flagicon Etsuko Takenaka	Template:Flagicon Noriko Takagi Template:Flagicon Hiroe Yuki	15–11, 15–10	Winner
1970	Denmark Open	Template:Flagicon Etsuko Takenaka	Template:Flagicon Hiroe Amano Template:Flagicon Noriko Takagi	15–17, 15–12, 15–9	Winner
1970	U.S. Open	Template:Flagicon Etsuko Takenaka	Template:Flagicon Susan Whetnall Template:Flagicon Margaret Boxall	15–10, 15–11	Winner
1971	Denmark Open	Template:Flagicon Etsuko Takenaka	Template:Flagicon Noriko Takagi Template:Flagicon Hiroe Yuki	10–15, 3–15	Runner-up
1972	Denmark Open	Template:Flagicon Etsuko Takenaka	Template:Flagicon Noriko Takagi Template:Flagicon Hiroe Yuki	11–15, 15–11, 15–17	Runner-up
1972	All England Open	Template:Flagicon Etsuko Takenaka	Template:Flagicon Margaret Beck Template:Flagicon Julie Rickard	9–15, 15–8, 15–12	Winner
1973	All England Open	Template:Flagicon Etsuko Takenaka	Template:Flagicon Margaret Beck Template:Flagicon Gillian Gilks	15–10, 10–15, 15–11	Winner
1974	Denmark Open	Template:Flagicon Etsuko Takenaka	Template:Flagicon Pernille Kaagaard Template:Flagicon Ulla Strand	18–15, 15–12	Winner
1975	All England Open	Template:Flagicon Etsuko Takenaka	Template:Flagicon Theresia Widiastuti Template:Flagicon Imelda Wiguna	15–11, 17–14	Winner

Mixed doubles

Year	Tournament	Partner	Opponent	Score	Result
1970	US Open	Template:Flagicon Ippei Kojima	Template:Flagicon Paul Whetnall Template:Flagicon Margaret Boxall	8–15, 2–15	Runner-up

Invitational tournament

Women's doubles

Year	Tournament	Partner	Opponent	Score	Result
1974 (Glasgow)	World Invitational Championships	Template:Flagicon Etsuko Takenaka	Template:Flagicon Margaret Beck Template:Flagicon Nora Perry	15–7, 15–8	Gold Gold