[1] Under the name Yuki Mogami she worked as a gravure idol starting in 2009, but changed her professional name in 2012 to pursue an acting career.

[3] She also appeared in the erotic romance film Hello, My Dolly Girlfriend, which was described by Mark Adams of Screen Daily as a "bizarre blend of voyeuristic sexuality and rather brutal violence".

Mamiya starred in the 2016 erotic suspense film The Crawler in the Attic (屋根裏の散歩者, Yaneura no Sanposha), an adaptation of an Edogawa Ranpo story.

[8] Slant Magazine noted the film's resemblance to "vintage American screwball comedy, in which a rigid man is freed of his reservations by the uninhibited behavior of a beautiful and intelligent woman".

[1] She played a villain with psychokinetic powers in the 2018 live-action TV Tokyo adaptation of the ONE manga Mob Psycho 100,[12] then played the role of Maiko in Manabu Oda's feature debut film Simon and Tada Takashi, a "gay romance" about two friends on their way to meet an older woman for a date.