Takano made her professional debut against Yukiko Seki at JEWELS: 20th Ring on July 21, 2012, and won the fight by unanimous decision.
She amassed a 3-5 record over her next eight fights, with a notable three-fight losing streak to Mina Kurobe, Saori Ishioka and Naho Sugiyama.
Takano first faced Masako Yoshida in the tournament quarterfinal bout at Deep Jewels 7 on February 20, 2015, and won by unanimous decision.
She won the fight by unanimous decision, and advanced to the finals of the one-day tournament, where she faced Mei Yamaguchi.
Takano was next scheduled to face Tessa Simpson at PXC 52 on August 13, 2016, as a replacement for Mei Yamaguchi.
[9] Takano was scheduled to face Miyuki Furusawa at Deep Jewels 14 on November 2, 2016, and won the fight by a first-round technical submission.
Takano next faced Ye Jin Jung at Deep Jewels 15 on February 25, 2017, and won the fight by a 39-second guillotine choke.
[10] She was afterwards scheduled to fought a rematch with Tomo Maesawa at Deep Jewels 16 on May 20, 2017, and won by a second-round technical knockout.
[18] Takano made her strawweight and ONE Championship debut against Michele Ferreira at ONE Warrior Series 6 on June 20, 2019.
[34] Takano faced Sayako Fujita on March 31, 2024 at Pancrase 341, winning the bout by a first-round knockout.