Yaguchi Miki (矢口美樹; stagename: やぐちみき) is a former first generation member of AKIHABARA Backstage pass. She graduated from the café on November 30, 2012.
- Name: Yaguchi Miki (矢口美樹)
- Nickname: Mikibou (みきぼーぅ)
- Birthdate: July 18, 1988
- Birthplace: Kanagawa, Japan
- Blood type: A
- Height: 152cm
- Shoe Size: 22.5cm
- Hobbies: Karaoke, dance, movies, singing, Watching American cartoons (ex: The Simpsons)
- Specialty: Cooking, Singing in Harmony in Karaoke, Handcrafting, watching people, Using the wrong words
- She is Yaguchi Mari's younger sister.
- She dislikes narcissistic people.
- She is a fan of One Piece and Naruto.
- If she ever won the lottery, she'd like to go to Hawaii.
- If she had one wish, she'd like to speak English.
- Her favorite animals are dogs.
- She'd like to go on a date to Disneyland.
- She'd like to travel to New York.
- She collects American cartoons and comics.
- Her favorite male artist is Will Smith.
- She likes the band Ikimonogakari.