- Name: Akiyama Mao (秋山眞緒)
- Birthdate: July 29, 2002
- Birthplace: Osaka, Japan
- Blood Type: B
- Height: 156.5cm
- Hobbies: Dancing, gymnastics, cleaning
- Specialties: Dance, gymnastic back bridge
- Favorite Food: Vegetables, steak
- Least Favorite Food: Paprika, shiitake mushrooms, green peppers
- Favorite Color: Rose pink
- Looks Up To: Suzuki Airi, Sasaki Rikako
- Hello! Project groups:
Akiyama Mao was first introduced as a member of Hello! Pro Kenshuusei through an announcement on the official Hello! Project website on April 27, 2015. She participated in the Morning Musume 12th Generation Audition the same year, but failed. The next year on August 13, 2016 she was revealed to be one of three new members of Tsubaki Factory through a surprise announcement given at a fan club event for the group.
- TV Programs
- [2016–2019] The Girls Live
- [2019–2020] AI・DOL PROJECT
-  Hello Pro! TOKYO Sanpo Season2 (ハロプロ！TOKYO散歩 Season2)
- [2015–] Hello! Station (ハロ！ステ)
-  Hello Pro no Oshigoto Challenge! (ハロプロのお仕事チャレンジ!)
- [2019–] Hello Pro Dance Gakuen (ハロプロダンス学園)
-  Hello Pro Kouhaku Taiko THE☆BATTLE 2019 (ハロプロ紅白対抗 ザ☆バトル2019)
-  Hello Pro ONExONE (ハロプロ ONE×ONE)
-  Hello Pro no Oshigoto Challenge! 2 (ハロプロのお仕事チャレンジ!2)
-  Hello! Project presents..."Premiere seat"
- Music Videos
-  Nega Poji Poji (ネガポジポジ)
-  Harukanaru Toki no Naka de 6 Gaiden ~Tasogare no Kamen~ (遙かなる時空の中で６ 外伝 ~黄昏ノ仮面~)
-  Tsubaki Factory no Camellia Night (つばきファクトリーのキャメリアナイト)
- Her favorite sports are cat and mouse, and dodge ball.
- Her motto is "Honesty is the best policy".
- Her favorite Hello! Project songs are "Nen ni wa Nen" by Kobushi Factory and "Jounetsu Ecstasy", "Jinsei wa STEP!", and "Iron Heart" by °C-ute.
- Her favorite styles of dance are hip hop and waack.
- Thinks her strengths are working hard at everything and hating to lose.
- Believes her weakness is giving up quickly if she feels she can't do something.
- Considers her charm points to be her nose and her forehead.
- Her dream was to have her major debut as an idol.
- Her favorite music genre is western music.