born February 7, 1996 in Saitama Prefecture is a Japanese former singer and actress. At age 6, she auditioned for Hello! Project Kids in 2002 and later became part of Cute, a Japanese idol girl group associated with Hello! Project.
In addition to Cute's activities, Hagiwara briefly ventured into voice acting and played Hikaru Mizuki in the anime Kirarin Revolution from June to September 2007. As part of the show, she became part of the in-show subgroup Kira Pika with Morning Musume's Koharu Kusumi and released their only single, "Hana o Pūn / Futari wa NS" on August 1, 2007. Hagiwara also released her character's version of the song "Koi no Mahō wa Habibi no Bi" for the soundtrack. She made televised and concert appearances portraying Hikaru in real life and appeared as a special guest during Kirarin Revolution's final concert at Nakano Sun Plaza on May 4, 2009.
In 2009, Hagiwara, Saki Nakajima, and Erina Mano released the song "Kimi ga Iru Dake de" as Petit Moni. In 2012, Hagiwara released her first solo DVD single "Ike! Genki-kun." In 2013, Hagiwara became part of the subgroup Hi-Fin for the Satoumi Movement. Hi-Fin released the song "Kaigan Seisō Danshi" on August 7, 2013 in a compilation album with other artists in the Satoumi Movement.
On August 2, 2021, Hagiwara announced on her social media that she is married to a non-celebrity man. On October 16, 2024, Hagiwara shared on her Instagram that she is expecting her first child, which is due around March next year. On March 16, 2025, she announced that she had given birth to a baby boy on the evening of March 11.
| + List of non-single guest appearances, with other performing artists, showing year released and album name ! style="width:22em;" | Title ! Year ! Other artist(s) ! Album |
| 2002 | Maimai the Angel | Performed ending song as 4Kids | |
| 2011 | Ōsama Game | Miharu Kanazawa | Supporting role |
| 2002–2007 | Hello! Morning | Herself | TV Tokyo | Morning Musume's variety show |
| 2002–2004 | Hello Kids | Herself | TV Tokyo | Minimoni's variety show |
| 2005 | Musume Document 2005 | Herself | TV Tokyo | Morning Musume's variety show |
| 2005–2006 | Musume Dokyu! | Herself | TV Tokyo | Morning Musume's variety show |
| 2006 | Sento no Musume?! | Hinako | MBS TV | Supporting role |
| 2007–2008 | Haromoni | Herself | TV Tokyo | Morning Musume's variety show |
| 2007 | Kirarin Revolution | Hikaru Mizuki | TV Tokyo | Voice; episodes 62–77 |
| 2008 | Berikyū! | Herself | TV Tokyo | Berryz Kobo and Cute's variety show |
| 2008 | Yorosen! | Herself | TV Tokyo | Hello! Project's variety show |
| 2009 | Bijo Houdan | Herself | TV Tokyo | Hello! Project's variety show |
| 2010 | Bijo Gaku | Herself | TV Tokyo | Hello! Project's variety show |
| 2011–2012 | Hello Pro! Time | Herself | TV Tokyo | Hello! Project's variety show |
| 2012 | Sūgaku Joshi Gakuen | Yuko Yotsuya | NTV | Episode 8 |
| 2012–2013 | Hello! Satoyama Life | Herself | TV Tokyo | Hello! Project's variety show |
| 2014–2017 | The Girls Live | Herself | TV Tokyo | Up-Front Works's variety show |
| 2004 | Here's Love | Hendrika | Double-cast with Chisato Okai |
| 2007 | Neruko wa Cute | Herself | Lead role |
| 2008 | Keitai Shōsetsuka | Herself | Lead role |
| 2009 | Ataru mo Hakke!? | Herself | Lead role |
| 2010 | Akuma no Tsubuyaki | Herself | Lead role |
| 2011 | Sengoku Jietai | Herself | Lead role in Defense |
| 2012 | Stronger | Herself | Lead role |
| 2012 | Cat's Eye | Herself | Lead role |
| 2013 | Sakura no Hanataba | Rika Kaneko | Lead role |
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