|Birthdate||May 24, 2004|
|Current Age||18 Years Old|
|Social Networks||SHOWROOM / Twitter / Instagram|
|Idol Career Info|
|Debuted||January 2018 / Draft 3rd Generation|
- 1 Catchphrase
- 2 Trivia
- 3 History
- 4 AKB48 Senbatsu Elections
- 5 Team History
- 6 Singles Participation
- 7 Units
- 8 Gallery
- にこにこ菩薩といえば～?（はーたん!）アコースティックギターができます! 栃木県出身、15歳、中学2年生、高橋チームBドラフト研究生の、はーたんこと齋藤陽菜です!
- Nikoniko bosatsu to ieba? (Haatan!) AKOUSUTIKKU GITAA ga dekimasu! Tochigi-ken shusshin, 15sai, chuugaku 2nensei, Takahashi CHIIMU B DORAFUTO Kenkyuusei no Haatan koto Saito Haruna desu!
- Admired senpai: Sashihara Rino and Watanabe Mayu
- Favorite food: Meat
- Least favorite food: Vegetables
- Favorite AKB48 song: LOVE Shugyou
- Hobbies: Acoustic guitar, reading
- Special skills: Reciting pi while playing otedama (currently knows 250 digits)
- Strengths: Considerate, good memory, can look at things objectively
- She was Team B's 1st choice at the Draft.
- Her oshimen is fellow Draft 3rd Gen member Okada Rina.
- She auditioned for =LOVE in the past.
- Her name is spelled with the character 齋 for "Sai", but since this character can display differently on different computer operating systems, on many mobile sites and media images it is written using the more common character 斎 instead.
- She loves rap and hip-hop, and sometimes writes her own raps.
- She considers herself a "sadistic" (teasing) type, and a "tsukkomi with a poison tongue" (harshly critical of others).
- She was diagnosed with coronavirus on August 12th, 2021, and resumed activities on August 27th, 2021.
- She is on hiatus as of February 9th, 2022 due to poor physical condition.
- She likes reading Senryu poetry.
- On September 7th, was promoted to Team B.
- On December 8th, at the AKB48 16th Anniversary Team Shuffle, it was announced she would be transferred to Mukaichi Team A.
AKB48 Senbatsu Elections
- 10th Senbatsu Election - Not Ranked
- 2017 Member Draft Pool → AKB48 Kenkyuusei → Team B → Team A
- Shonichi (Solo)
Saito Haruna 10th Senbatsu Election Poster (2018)
Saito Haruna (2018)
Saito Haruna (Draft 2018)