[1][2][3] Chiba grew up idolizing Olympic gold medalist and Sendai hometown hero Yuzuru Hanyu;[1] they met on the ice several times and he was "like a big brother" for her before he moved to Toronto, Canada to further his training.

[1] Chiba began skating in 2010 and was coached by Soshi Tanaka at the Sendai Ice Rink from the ages of six to eighteen.

[6] Chiba was initially scheduled to make her Junior Grand Prix debut at the Armenian stop on the 2022–23 circuit.

In her short program, she received an edge call on her combination but otherwise gave a clean skate, placing her first with a score of 70.16 points.

[12] At her second assignment, the 2022 JGP Italy, Chiba finished third in the short program, but dropped to fourth place after making several errors.

[6] In May 2023, it was announced that Chiba had relocated from Sendai to Uji, Kyoto, where she would be coached by Mie Hamada at the Kinoshita Academy.

[19][20] Chiba began the season on the Challenger circuit, coming sixth at the 2023 CS Autumn Classic International.

She admitted after the segment that she had felt "a little unwell" since the French Grand Prix, but said that she had been able to recover adequately, while self-critiquing that "with my current skating skills, I'm only able to express half of the emotions.

"[24] Chiba won the short program at the 2024 Four Continents Championships, the only error being an incorrect edge call on her triple Lutz.

"[26] Entering the 2024 World Championships in Montreal with medal hopes, Chiba encountered difficulty in the short program after singling a planned triple Lutz, coming thirteenth in the segment.

[6] She began the Grand Prix series at the 2024 NHK Trophy, where she gained a new personal best score in the short program of 71.69.

[29] Scoring 140.85 in the free skate and 212.54 overall, Chiba won her first Grand Prix medal, a silver, as part of a Japanese team sweep, alongside Kaori Sakamoto, and Yuna Aoki.

[30] At her second Grand Prix event, the Cup of China, Chiba led in the short program by .02 points over Amber Glenn.

Due to her success on the Grand Prix circuit as well as national silver medalist, Mao Shimada, being age ineligible to compete on the senior level, Chiba was named to the Four Continents and World teams.