Hagiwara Mai (萩原舞) is a Japanese apparel designer and former idol under Hello! Project as a member of ℃-ute. She joined Hello! Project Kids in 2002 through the audition and was later put into ℃-ute in 2005. Hagiwara has also taken part in the one-shot unit Kira☆Pika alongside Morning Musume member Kusumi Koharu. She is also a former member of Cat's♥Eye 7 and HI-FIN. Hagiwara decided to retire from the entertainment industry to study English abroad in New Zealand following the disbandment of ℃-ute on June 12, 2017.
Hagiwara Mai was born on February 7, 1996 in Saitama, Japan.
Hagiwara continued her work within Hello! Project Kids, performing alongside Morning Musume at concerts as backup dancers.
In late 2004 Hagiwara took part in her first Hello! Project shuffle unit, H.P. All Stars, taking part alongside all the members of Hello! Project at the time. The shuffle unit released one single and became inactive by January 2005.
Hagiwara was assigned as a member of Hello! Project group ℃-ute alongside seven other Hello! Project Kids members. These eight members had been passed over when it came to the forming of Berryz Koubou, which had originally been formed to teach the Hello! Project Kids about being in a group by rotating the line-up amongst the kids. Originally ℃-ute was releasing songs on an indie label, but in 2007 they made their major debut.
Hagiwara Mai released four indie singles as a part of ℃-ute in preparation for their major debut in 2007. ℃-ute also released their first album, Cutie Queen VOL.1.
On February 21, ℃-ute released their debut single, "Sakura Chirari." On the first day in the Oricon charts it ranked third, a feat not even accomplished by Hello! Project's mother group Morning Musume (who had ranked 6th on their debut single). With their debut single, they became the youngest group (with the average age of 13) to rank in the top 10. Hagiwara provided minor vocals for their debut single.
Hagiwara also joined with Morning Musume's Kusumi Koharu to form a one-shot unit named Kira☆Pika. The group was formed to perform songs for the anime Kirarin☆Revolution, as both girls voiced characters in the series. They released their debut single on August 1.
Hagiwara Mai, along with four other members of ℃-ute and Berryz Koubou left the Hello! Project futsal team Gatas Brilhantes H.P.. The members left of their own violition due to feeling that they could not perform as high level players due to their level of ability.
On December 15, Hagiwara opened her first Ustream channel called Mai Desu ga... Nani ka?. In the show, Hagiwara invites various Hello! Project members to do activity with her such as talking and cooking.
On July 25, it was announced that Hagiwara, Yajima Maimi, Nakajima Saki and Berryz Koubou's Shimizu Saki, Sudo Maasa, Kumai Yurina and Sugaya Risako would be performing in an stage play titled CAT'S♥EYE based on a manga. The stage play ran from September 22 to September 30.
On March 2, at Forest For Rest ~SATOYAMA e Ikou~ SATOYAMA movement in YOKOHAMA, Hagiwara was announced a member of the new SATOUMI movement unit, Plumeria (later renamed HI-FIN), along with fellow ℃-ute member Nakajima Saki, S/mileage's Fukuda Kanon, and Morning Musume's Ishida Ayumi and Ikuta Erina.
On July 3, it was announced Hagiwara would be releasing her second photobook called Mai2 on August 5.
On January 17, the official site of Hello! Project announced that Hagiwara had a high fever. She was immediately taken to the hospital where she was diagnosed with influenza. For this reason she was not present for the handshake event scheduled that day and she was also not present in the Hello! Project 2014 WINTER concert tour on January 18 and 19.
From February 5 to 7, Hagiwara, Yajima Maimi, and Nakajima Saki celebrated their birthdays in a joint fanclub event called Yajima Maimi・Nakajima Saki・Hagiwara Mai 2014 Birthday Event, which featured six performances in Saitama, Osaka, and Tokyo.
On February 26, Hagiwara featured in a special book called "Graduation -High school graduation- 2014" with four other idols graduating high school that Spring. It contained photos and interviews.
On February 5, 6, and 8, Hagiwara, Yajima Maimi, and Nakajima Saki celebrated their birthdays in a joint fanclub event called ℃-ute Yajima Maimi・Nakajima Saki・Hagiwara Mai Birthday Event 2015, featuring four performances in Tokyo.
On February 7, Hagiwara and Yajima Maimi celebrated their birthdays in a joint fanclub event called ℃-ute Yajima Maimi & Hagiwara Mai Birthday Event 2016, featuring three performances in Tokyo.
During the last show of ℃-ute's 11th anniversary event on June 11, Hagiwara made an apology after Shukan Bunshun reported and published photos of her walking with a man on the tabloid's web program back in April. She admitted the man was a friend and did not think fans would misunderstand, and even considered quitting in order to take responsibility for the problems it caused. However, she spoke to the other ℃-ute members who wanted to continue to work hard together, and Hagiwara stated she would slowly do her best to regain fans' trust and support. Group leader Yajima also made a blog post with similar statements.
On February 7, Hagiwara and Yajima Maimi celebrated their birthdays in a joint fanclub event called ℃-ute Yajima Maimi & Hagiwara Mai Birthday Event 2017, featuring two performances in Tokyo.
On February 7, Hagiwara showed her face for the first time since ℃-ute disbanded (between this time, other former ℃-ute members had her face covered in photos) by opening an Instagram account on her 22nd birthday. She announced she was currently studying abroad and was working hard on a career path that is not part of the entertainment world.
On May 31, Hagiwara was announced as the design producer of &IDOL, a committee of former idols led by former Idoling!!! member Ito Yuna who aim to collaborate with various industries to develop a new market with a business concept that is centered on idols (active and retired) and would help grow the economy. Their first project was a beach café named SUMMER&IDOL which was open at Yuigahama in Kamakura Prefecture from July 2 to August 31.
On July 2, she announced that she had designed an original T-shirt for the SUMMER&IDOL project under the brand name With Mii which she plans to start as an official company. She established the company on September 13 and opened an official website for it.
On August 2, Hagiwara announced on social media that she privately married someone from outside the entertainment industry. Several months later, they released a video of the hours before their ceremony.
In October, Hagiwara and her husband (credited as YUKI) opened a youtube channel where they could share recipes and their life as a couple.
Hagiwara has an older sister who auditioned for Hello! Project Kids alongside Mai, but failed to pass.
She also has a pet dog named Chip-kun.On October 3, 2016, Hagiwara's grandmother passed away. 
Hagiwara's given name, Mai, means "dance" (舞; mai). "Mai" was the name of a heroine in a manga her mother was reading, and since the character was a very beautiful girl, she was named Mai.
- Maimai (マイマイ): Official nickname, given her since joining ℃-ute. Used by members and fans.
- Hagi-chan (萩ちゃん): Second official nickname, given her since joining ℃-ute. Used by members and fans.
- Hagitty (ハギティ): Derives from mixing "Hagiwara" and "Kitty".
- Name: Hagiwara Mai (萩原舞)
- Nicknames: Maimai (マイマイ), Hagitty (ハギティ), Mai-chan (まいちゃん), Hagi-chan (萩ちゃん), Mai (まい)
- Birthdate: February 7, 1996
- Birthplace: Saitama, Japan
- Blood Type: AB
- Height: 158 cm (5 ft 2.2 in)?
- Western Zodiac: Aquarius
- Eastern Zodiac: Pig (Boar in Japan)
- Audition Song: Te wo Nigitte Arukitai
- Hello! Project Status:
- 2002-06-30: Member
- 2005-06-11: ℃-ute member
- 2017-06-12: Graduated (℃-ute disbands)
- UP-FRONT GROUP Status:
- Years in ℃-ute: 12 Years
- Official Kaomoji: (o・ⅴ・)
- ℃-ute Color:
- Purple (2006–2009)
- Yellow (2009–2017)
- Cat's♥Eye 7 Color:
- Orange (2012)
- Hello! Project Groups:
- Shuffle Units:
- Concert Units:
- Other Groups:
- Main article: Hagiwara Mai/Discography
- [2012.04.04] Yuke! Genki-kun
- [2007.09.12] Koi no Mahou wa Habibi no Bi! (恋の魔法はハビビのビ!) (Kusumi Koharu cover)
- [2012.02.02] Yuke! Genki-kun (行け！元気君)
- [2012.04.18] Kimi wa Jitensha Watashi wa Densha de Kitaku (君は自転車 私は電車で帰宅) (C-ute Cover)
- [2009.10.21] Hagiwara Mai in Hachijojima (萩原舞 in 八丈島)
- [2011.06.14] Mizuiro (水色) (e-Hello! DVD)
- [2014.09.15] again (e-Hello! DVD)
- Main article: Hagiwara Mai/Publications
- [2002.12] Minimoni the Movie Okashi na Daibouken! (ミニモニ。じゃム→ビ→お菓子な大冒険！)
-  Sentou no Musume!? (銭湯の娘!?)
-  Ousama Game (王様ゲーム) (as Kanazawa Miharu)
- [2002–2007] Hello! Morning (ハロー! モーニング)
-  ℃-ute has come. ~℃-ute ga Yatte Kita~ (℃-ute has come.～キュートガヤッテキタ～) (2 episodes)
- [2007–2008] Haromoni@ (ハロモニ@)
-  Berikyuu! (ベリキュー!)
- [2008–2009] Yorosen! (よろセン!)
- [2010–2011] Bijo Gaku (美女学)
- [2011–2012] Hello Pro! TIME (ハロプロ！ＴＩＭＥ)
- [2012–2013] Hello! SATOYAMA Life (ハロー！ＳＡＴＯＹＡＭＡライフ)
- [2014–2017] The Girls Live
-  ℃-ute no Challenge TV (℃-uteのチャレンジTV)
- [2002–2003] Liliput Oukoku (リリパット王国)
-  Suugaku♥Joshi Gakuen (数学♥女子学園)
-  34 Choume no Kiseki -HERE'S LOVE- (34丁目の奇跡 -HERE'S LOVE-)
-  Neruko wa ℃-ute
-  Keitai Shosetsuka
-  Atarumo Hakke!?
-  Akuma no Tsubuyaki
-  Sengoku Jieitai
-  STRONGER (ストロンガー)
-  CAT'S♥EYE (キャッツ♥アイ)
-  Sakura no Hanataba (さくらの花束) as Kaneko Rika (金子梨花)
-  Kirarin☆Revolution (きらりん☆レボリューション) (as Mizuki Hikaru)
- [2011–2012] Mai Desu ga...Nani ka? (萩原舞ですが、、、なにか？？)
- [2013–2017] Hello! Project Station
- [2014–2016] MUSIC+
- [2015–2016] GREEN ROOM
- [2016–2017] Upcoming
- [2016–2017] Girls Night Out
-  Japan Meat Information Service Center - Oh!Niku (日本食肉消費総合センター)
-  Tokai no Hitorigurashi (都会の一人暮らし) (Radio drama)
- [2016.10] HELLO! DRIVE! (HELLO! DRIVE! -ハロドラ-) (Fridays)
|Youngest active member of Hello! Project
May 2005 – April 2009
|Youngest member of ℃-ute
June 11, 2005 – June 12, 2017
|Youngest member of Petitmoni V
January 2009 – January 2011
- With Mii Official Site
- ℃-ute Profile (archived)
- Official ℃-ute Ameba Blog (inactive)
- Official ℃-ute GREE Blog (inactive)
- Hagiwara Mai Ustream Channel (inactive)