She was first active as a centerfold model,[1] and she debuted on video in May 2010 with the gravure (non-nude) release Emanechio (エマネチオ),[2] which was filmed in Bali.

[4][5] Four months later she debuted at the studio Idea Pocket with First Impression Rika Hoshimi, directed by Tadanori Usami, released on January 1, 2012.

[7] The film shows Hoshimi partaking in a special photo session in America organized by the studio and accompanied by other famous AV actresses signed under Idea Pocket including Kaho Kasumi, Jessica Kizaki, Rio, Aino Kishi, Minori Hatsune and Emiri Okazaki.

[8][9] She also appeared in several other films like Schoolgirl Blackboard Jungle and Undressing Mahjong Gakuen Z[10] On April 19, 2014, she starred in her last AV with Idea Pocket Gang Bang Rika Hoshimi.

[17] The film is notable for being shot in documentary style of Hoshimi taking a trip to Thailand while also engaging in sexual activity.