Etsuko Toganoo (栂野尾 悦子, Toganoo Etsuko) (formerly Etsuko Takenaka) is a retired Japanese badminton player noted for her consistency and impassive demeanor, who won numerous international titles during the 1970s. Along with her contemporaries Hiroe Yuki (Niinuma) and Noriko Takagi (Nakayama), she is one of three Japanese women to have won both singles (1970) and doubles (1972, 1973, 1975, 1977) at the prestigious All-England Championships. These three helped Japan to dominate the Uber Cup (women's world team) competition from the mid-1960s to the early 1980s. In 1977 Mrs. Toganoo won the women's doubles with Emiko Ueno at the first IBF World Championships.
- Pat Davis, The Guinness Book of Badminton (Enfield, Middlesex, England: Guinness Superlatives Ltd., 1983) 106, 108.
- Davis, 133-136.
- Davis, 109.