Born April 4, 2001 in Nagano Prefecture, Azuma (often stylized as Azusa) Sasaki grew up with a deep love for both traditional Japanese folk music and contemporary Western pop. She entered the entertainment industry at age 15 after winning a regional talent competition. Her audition for 10MUSUME showcased not only a polished vocal range (C3–C5) but also an ability to play the shamisen, an uncommon skill among idols that immediately set her apart.
| Date | Event | Notable Features | |------|-------|-------------------| | 5 Jan 2023 | 10musume New Year Countdown Live (Tokyo Dome) | Azusa performed an extended dance break during “121314” with live backing vocalists. | | 16 Mar 2023 | K-Pop × J‑Pop Collaboration Stage (Seoul) | 10musume performed “121314” alongside K‑pop group STAYC, merging choreography. | | 22 Oct 2023 | Summer Festival “AquaWave” (Osaka) | First outdoor rendition; the group used LED umbrellas synced with the song’s synth pulses. | | 30 Jun 2024 | 10musume 6‑Year Anniversary Tour “Ten Years of Ten” (Tokyo) | Acoustic version of “121314” featuring a string quartet and a solo vocal section for Azusa. | | 12 Nov 2025 | Virtual Reality Concert “Beyond Ten” (online) | Fans could experience a 360° stage where “121314” visuals reacted to audience heart‑rate data. | 10musume 121314 01 azusa sasaki
Beyond group activities, Sasaki has pursued a solo career that mirrors her personal interests: Born April 4, 2001 in Nagano Prefecture, Azuma
These solo endeavors reinforce her public image as a “cultured idol,” someone who brings depth and artistic integrity to the idol world. Beyond group activities, Sasaki has pursued a solo