Tamao Ozawa (小沢珠緒, Ozawa Tamao, born 16 May 1985) is a Japanese retired professional boxer who is a former WBO female super-flyweight World champion.

Ozawa made her professional boxing debut in August 2011, going on to win the vacant Oriental and Pacific Boxing Federation super-flyweight title on 3 April 2015, with a split decision victory over Terumi Nuki at the Prefectural Gymnasium, Osaka, Japan.^[4][5]

She was unsuccessful in her first attempt to win a world title, losing via split decision to South Korea's Hong Su-yun in a contest for the vacant WBO female light-flyweight crown at KBS Hall, Kyoto, Japan, on 14 May 2017. One ringside judge scored the bout 96–94 to Ozawa with the other two awarding it by the same score to her opponent.^[6][7]

Switching to back to super-flyweight, Ozawa travelled to Germany to face Raja Amasheh for the vacant WBO female super-flyweight World title at Palazzohalle, Karlsruhe, on 10 March 2018. Once again she fell short, losing by unanimous decision with all three judges scorecards' reading 96–94.^[8][9]

Ozawa bounced back to win the vacant Japanese flyweight title on 14 April 2019, beating Hye Soo Park by unanimous decision at KBS Hall.^[10][5]

After a three-year hiatus during which time she gave birth to a son, Ozawa returned to the ring on 30 May 2022, to challenge WBO female super-flyweight World champion Miyo Yoshida at Korakuen Hall, Tokyo, Japan. She won the fight by split decision to finally claim a global title. Two judges favoured Ozawa 97-93 while the third saw the fight 96-94 for Yoshida.^{[11][12][13][5]}

Ozawa announced her retirement from professional boxing on 27 October 2022. In a written statement revealing her decision she said: "With the support of my husband (pianist Ryohei Kishimoto) and the patience of my son, I was somehow able to take part in the world fight in May. I thought about my family's future and decided to put an end to it here. I have been working hard to become world champion, so I am grateful to have been given this opportunity, and I feel that I have received a great reward at the end. I have had many good connections thanks to my continued boxing. Thank you."^{[5] [14]}