Ōtomo competed at the 2004 Summer Olympics in Athens, Greece, wearing the number #13 jersey.

In 2008, Hisamitsu Springs announced that Ōtomo would return to active duty.

In September 2011, due to a right knee injury, Japan Volleyball Association announced that Ōtomo would not play in the World Cup.

[2] At the 2012 Summer Olympics, Ōtomo was part of the Japanese team that won the bronze medal in indoor women's volleyball.

[3] In January 16, 2006, Ōtomo [who was already two months pregnant at the time] married Tatsuo Yamamoto, a professional beach volleyball player.