Kyoko Endo is a Japanese singer-songwriter whose career began in the early 1980s and has spanned several decades, including a notable connection to anime through her performance of an ending theme song.

Endo made her debut as a recording artist in November 1981 with the single Kokuhaku Telephone. This debut was composed by the legendary Kyohei Tsutsumi, one of the most prolific and successful composers in Japanese pop music history. Her third single, Hitori Narcissist, released in October 1982, marked a significant turning point as it was the first release for which Endo took on the role of both lyricist and composer, establishing her as a full-fledged singer-songwriter. This track was arranged by Hiroyuki Namba, a respected keyboardist and author.

Throughout the 1980s and 1990s, Endo released a series of albums that have become associated with the City Pop genre, a style of Japanese pop music that incorporated elements of funk, jazz, and R&B. Her debut album Operetta was released in December 1981. Another early album, Yumemiru Star, was reissued on CD in June 1994. Her musical output continued well into the 1990s, with albums such as Koibito ni Naritai from March 1993 and Fuyu no Niwa from November of the same year. A compilation titled Ballad Best was also released in December 1993, featuring tracks like Kagitakunai and Be Love. Her work is characterized by a versatile pop style, moving between sophisticated urban pop, jazz-influenced arrangements, and more introspective balladry.

Endo is most directly connected to the anime world through her contribution to the television series Dai-Guard. This mecha anime, which aired from October 1999 to March 2000, used her song Hashire Hashire (Run, Run) as its first ending theme for episodes one through twenty-five. The song was also included on her compilation album Wild Flower - Best of Pure Mode Years 1999-2018, released on June 20, 2018, which features a selection of her work from that nearly two-decade period. The arrangement for the ending theme of Dai-Guard was handled by the acclaimed composer Yoko Kanno.

Beyond her work for anime, Endo has maintained a career as a recording artist with a distinct musical identity. She is known for writing and composing much of her own material and has explored various pop subgenres. Her song Jenny Fey, released as a single in April 1988, was also written and composed by her, with arrangement by Yutaka Hosoi of the band Sentimental City Romance. Her music is often noted for its melodic sophistication and her clear, expressive vocal style. According to her official profile, one of her personal interests includes the work of Soviet animator Yuriy Norshteyn, known for films like Hedgehog in the Fog and Tale of Tales.