In June, Arai auditioned for the Hello Pro Egg auditions and passed.
In May 2007, Arai officially started activities as a Hello Pro Egg member along with Kikkawa Yuu at the Dai Ikkai Hello! Project Shinjin Kouen ~Saru no Koku~ / ~Tori no Koku~.
On May 5, Arai and Sekine Azusa starred in the stage play Shiritsu Guriguri Gakuen.
Arai had a small role in a two-part horror movie titled ADA. The movie was directed by Koji Shiraishi and was released on July 13.
On August 27, Arai was officially appointed as the special envoy for tourism in Gunma Prefecture. Her responsibility will be to promote Gunma Prefecture's many specialties like local food, products, and sightseeing spots.
Also in August, Arai became one of the eight participants in the Dai 2kai Gravure Henshuu no Kakushidama Grand Prix, a competition for the future "Gravure Queen" of Weekly Playboy magazine. On December 8, it was announced that she had won the readers' vote.
On July 11, Uber Eats Japan released the "#Burger-in-the-House-Josei" CM starring Arai Manami which went viral in Japan, garnering over a million views on YouTube.
- Name: Arai Manami (新井愛瞳)
- Nickname: Maana (まぁな)
- Birthdate: November 19, 1997
- Birthplace: Gunma prefecture
- Western Zodiac: Scorpio
- Eastern Zodiac: Ox
- Bloodtype: B
- Height: 153cm
- Shoe Size: 23.5cm
- Hello! Project Status:
- 2004-06-20: Hello Pro Egg member
- 2011-03-09: Graduated
- UP-FRONT GROUP Status:
- Up Up Girls (Kari) Color: Blue
- Hello! Project Groups:
- Concert Units:
- Wonderful Hearts (2007-2010)
- Other Groups:
- Favorite Subjects: Math, English, Home Economics, Music.
- Least Favorite Subject: Japanese
- Favorite Food: Peaches and bread
- Least Favorite Food: Mushroom
- Looks Up To: Kamei Eri
Discography Featured InEdit
- Up Up Girls (Kari)
- First Album (Kari)
- Natsu Festival Sansen Kinen! 8/3「ROCK IN JAPAN FESTIVAL 2013」Setlist Album (Digital Album)
- Natsu Festival Sansen Kinen! 8/10「IDOL NATION 2013」Setlist Album (Digital Album)
- Natsu Festival Sansen Kinen! 9/22「Inazuma Rock Festival 2013」Setlist Album (Digital Album)
- Second Album (Kari) Special Remix Pack (Digital Album)
- Second Album (Kari)
- Third Album (Kari)
- 4th Album (Kari)
- 5th Album (Kari)
- 6th Album (Kari)
- Up Up Girls (Kari)
- Going my ↑
- Barebare I LOVE YOU
- Uppercut! / Yuudachi! Through the Rainbow
- Mechakyun♡Summer ( ´ ▽ ` )ﾉ
- Namen na! Ashi Girls / Marble Hero
- End Of The Season
- Kakko Tsukete Ii Desho! (Event Single)
- UPPER ROCK / Ichiban Girls!
- Chopper☆Chopper / Survival Girls
- Respect Tokyo / Sutorera! ~Straight Up!~
- SAKURA DRIVE / Dateline
- Next Stage / Ano Saka no Ue Made,
- Ginga Joujou Monogatari / Burn the fire!! / Natural Born Idol
- Summer Beam! / Up Up Typhoon
- SAMURAI GIRLS / Widol Seven
- Starry Night / Seishun Buildup
- Nijiiro Mosaic / ENJOY!! ENJO(Y)!!
- Santa Claus (Event Single)
- Up Ome!! ~Apuga no Oshougatsu da yo Zenin Shuugou!~ (Digital Single)
- (Kari) wa Kaesuze ☆ be your soul / Party! Party! / Jumper!
- Zenryoku! Pump Up!! / Kono Melody wo Kimi to
- Beautiful Dreamer / Zenryoku! Pump Up!! -ULTRA Mix- / Itadaki wo Mezase!
- Party People Alien / Seven☆Peace
- !!!!!!!! / Kimi to Iu Kasetsu
- UPPER DISCO / FOREVER YOUNG
- Joujou do Konjou / Be a Girl
- Ai Ai Fire!! / Watashitachi (with friend)
- Agenomics!! / Kimi Loss / Upper Ranbu
- Da Dan Dance! / Heat Beat Island / 5 to the 5th Power
- It's Up To You / HAPPY NAKED!! / BIG BANG
- Ganbarou Nippon Ai wa Katsu Singers
- T-Palette mini All Stars
- Team Makenki
- [2015.11.16] Seventeen Blue
- [2013.07.13] Ada ~ADA~ (讐 ～ADA～)
- [2011-2015] Up-Front Girls
- [2014-2019] The Girls Live
-  Sakura Saku (サクラ咲く)
- [2012.05.05] Shiritsu Guriguri Gakuen (私立グリグリ学園)
-  Harukanaru Toki no Naka de 6 Gaiden ~Tasogare no Kamen~ (daily guest role)
- [2012.06.10] Haikei shiryoshu 1 gakko kyoshitsu (Manga x anime kore 1 satsu!) (背景資料集1 学校・教室 (マンガ×アニメ これ1冊!)) (Sato Ayano, Saho Akari, Sekine Azusa, Arai Manami)
- [2015.04.20] Photo Technic Digital
- [2015.05.15] Young gangan
- Eats bread for breakfast.
- Has a habit of cracking her knuckles.
- Her favorite spot is the kotatsu at her house.
- Was the only Hello Pro Egg to wear glasses, all the time.
- She was the first Hello! Project member to be born after the formation of Morning Musume.
- While a member of Hello Pro Egg, she often carried around a photo of Morning Musume.
- She was born on the same day as former Hello Pro Kenshuusei member Kosuga Fuyuka.
- Shares the same last name with former Sheki-Dol member Arai Saki
- She is the youngest person ever to join Hello Pro Egg at the age of 6 at the time of joining.
Youngest member of Hello Pro Egg
Youngest member of Hello Pro Kenshuusei Ever
Youngest member of UFZS
Youngest member of Up Up Girls (Kari)
- ↑ 北原沙弥香、佐藤綾乃、関根梓、新井愛瞳に関してのお知らせ
- ↑ "新井愛瞳がぐんま観光特使に就任！" (in Japanese). Up Up Girls (Kari) Official Blog. 2014-08-27.
- ↑ "アイドルにＲＱ、読モも参戦！ 第２回・新人グラドル“ページ争奪”ガチバトル、エントリーはこの８人だ！" (in Japanese). Weekly Playboy NEWS. 2014-08-26.
- ↑ "「第２回グラビア編集の隠し玉グランプリ」を制した新井愛瞳は群馬が生んだ青春美少女！" (in Japanese). Weekly Playboy NEWS. 2014-12-08.
- ↑ "アンジュルム川村文乃とアップアップガールズ(仮)新井愛瞳が「えひめ西条！移住応援大使」に就任！" (in Japanese). Hello! Project. 2017-10-20.
- ↑ "芸能界“最強ゲームチーム”を決定する「第1回 eスポーツ スターバトル チャンピオンシップ」開催決定" (in Japanese). GAME Watch. 2017-12-20.
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