Kiyoe Yoshioka (吉岡 聖恵, Yoshioka Kiyoe, born February 29, 1984) is a Japanese singer and vocalist. She is best known for being the lead vocalist of the band Ikimonogakari since its founding in 1999. She has also been active as a solo singer, releasing her first album Utairo in 2018. In 2022 her song "Dekoboko" was used as the first opening theme to the anime series A Couple of Cuckoos.

You can help expand this article with text translated from the corresponding article in Japanese. (June 2022) Click [show] for important translation instructions. View a machine-translated version of the Japanese article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Consider adding a topic to this template: there are already 3,705 articles in the main category, and specifying|topic= will aid in categorization. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Japanese Wikipedia article at [[:ja:吉岡聖恵]]; see its history for attribution. You may also add the template {{Translated|ja|吉岡聖恵}} to the talk page. For more guidance, see Wikipedia:Translation.

Yoshioka was born in Shizuoka on February 29, 1984.^[1] She moved to Atsugi, Kanagawa Prefecture when she was five years old. She had an interest in music from an early age, learning to play the piano at the age of five. She would go on to study music at the Showa University of Music Junior College.^[2]

Yoshioka's music career began in 1999 when she became vocalist of the band Ikimonogakari.^[1] The band would temporarily disband the following year, but would reform in 2003.^[1] It made its major debut in 2006 with the release of the single "Sakura", with Yoshioka as vocalist.^[1]

In 2010, Ikimonogakari performed the song "Egao", which was used as the theme song to the anime film Pokémon the Movie: Genesect and the Legend Awakened.^[3] Yoshioka made a vocal cameo in the film, voicing an Eevee.^[4]

Yoshioka started a solo career after Ikimonogakari went on hiatus in 2017.^[5] Her first solo release, an album titled Utairo (うたいろ), was released on October 24, 2018.^[6] While Ikimonogakari resumed its activities later that year, Yoshioka would continue her solo career.^[7]

Yoshioka released her first solo single "Massara" (まっさら) on December 22, 2021.^[8] Her second single, "Dekoboko" (凸凹), was released on June 15, 2022;^[9] the title song was used as the first opening theme to the anime television series A Couple of Cuckoos.^[10]

In 2020, Yoshioka announced that she had married a person outside the entertainment industry. In June 2022 she announced that she was pregnant with her first child.^[11] In October 2022, she announced the birth of her child. ^[12]