Following her departure from NICE GIRL Project!, Yamashita became a singer with J-padGirls (camp-fire). She left J-padGirls sometime in 2013.
- Name: Yamashita Mizuki (山下瑞樹)
- Stage Name: Yamashita Mizuki (山下瑞稀)
- Nicknames: Mizukingu (ミズキング), Mizking, Mizuking
- Birthdate: September 9, 1993
- Birthplace: Chiba, Japan
- Bloodtype: A
- Height: 165cm
- Weight: 45kg
- Measurements: B75, W57, H85
- Hobbies: Singing, Dancing, Cosplaying, NicoNico
- Special Skills: Soft tennis, drawing illustrations
- [2012.11.21] Cat Food (キャットフード)
- She is an anime otaku, and her favorite anime is Prince of Tennis.
- She likes Vocaloid.
- She likes the color yellow.
- She has posed for Best Jeanist.
- She has modelled for angemodel.
- Her last blog post on the Trainees Collection blog was December 14, 2011.
- She had her debut solo live in January 2012, and as of 2013, she has free activities.
- She often wears wigs.