Career
During her sporting career, Takeba trained full-time for the Ehime Clay Shooting Association under her personal coach Atsushi Otsuke
Takeba made her official debut at the 2000 Summer Olympics in Sydney, where she wound up to sixteenth in the inaugural women"s trap with a score of 56 hits, narrowly escaping from the last spot in a field of seventeen shooters by four points. Shortly after the Games, Takeba rose to a sporting fame with a gold medal victory over Russian shooter and world record holder Elena Tkach at the 2001 ISSF World Cup final with a remarkable score of 88 targets. Improving her position from the previous Games, she amassed a total score of 59 hits out of 75 targets in the qualifying stage, but narrowly missed the final round by a single-point deficit with an eighth-place finish.