Yumi Yoshimura is a Japanese singer and musician, best known as one half of the pop duo Puffy AmiYumi (known as PUFFY in Japan). She was born on January 30, 1975, in Neyagawa, Osaka, Japan. Yoshimura began her music career after responding to a talent search in Tokyo in the mid-1990s. She was paired with Ami Onuki by Sony Music Japan, and the duo officially formed in 1996. Her primary role in the group is as a vocalist, but she is also known to play instruments including guitar, harmonica, piano, and saxophone. Outside of her work with the duo, Yoshimura has released solo material, including the 1997 single V-A-C-A-T-I-O-N and the solo album SoloSolo, also released in 1997.

Yoshimura and Onuki achieved significant success in Japan and internationally. As Puffy AmiYumi, they became known for a musical style that blends J-pop, rock, and pop-punk elements. Their music has been featured in numerous films, television shows, and commercials. In the realm of anime, Yoshimura has been credited for theme song performances both as a solo artist and with Puffy AmiYumi. One of her earliest and most direct connections to anime is her performance of the opening theme song for the series Tokyo Pig, known in Japanese as Hare Tokidoki Buta. Yoshimura is credited with the song Tsuyoki na futari, which served as the first opening theme for the show's initial seventeen episodes.

Beyond this individual credit, her work with Puffy AmiYumi has been heavily featured in anime. The duo performed the theme song for the American animated series Teen Titans, which contributed to their popularity in the United States. They have also contributed music to other anime franchises, including performances for the series Bunny Drop, Oh! Edo Rocket, SD Gundam Force, Hataraki Man, and the film Naruto Shippuden the Movie: Inheritors of the Will of Fire. The duo was the inspiration for and starred in their own animated series, Hi Hi Puffy AmiYumi, which aired on Cartoon Network from 2004 to 2006. The series featured their music extensively, further cementing their presence in the world of animation.

Yoshimuras musical identity is closely tied to the energetic and colorful aesthetic of Puffy AmiYumi. Her vocal style and stage presence have been a consistent element of the duos enduring appeal since the mid-1990s. The groups significance in the music industry includes bridging Japanese pop music with Western audiences, achieving chart success in both Japan and the United States. Her career, alongside Ami Onuki, helped pave the way for other Japanese acts seeking international recognition. Yoshimura remains active as a member of Puffy AmiYumi, continuing to record and perform.