Karin Azuma is a Japanese voice actor primarily known for their work in original animated video (OAV) productions, particularly within the erotica genre. A profile of their career is built from the roles they have performed in various adult anime series and video games.

Azuma's voice acting credits are concentrated in adult content, with several notable performances in OAV series during the late 2000s and 2010s. One of their earliest documented roles is as Midori Shouji in the 2007 OAV Hōkago 2 The Animation. In 2009, they voiced the character Kureha in the two-episode OVA series Shinobi Seduction, an adaptation of the visual novel Mitama: Nin.

Their filmography includes a range of other adult OAV titles. Azuma provided voices for Arisa Konno in Birei Okami Mie and Sakura Kujou in Please Rape Me!. They also performed multiple roles within a single series, voicing both Kei Ōtsuru and Mizuki Suda in different episodes of King of Breasts. Another credit from this period is a role in the OAV Necromancer.

In the 2010s, Azuma continued their work in the genre with a role in the television series Eroge! H mo Game mo Kaihatsu Zanmai. In this production, they voiced the character Aizawa Remon in an episode that aired in 2013. Their work also extends to video games, with a noted role as Shizuri Unazuki in the game Yuki Koi Melt. Throughout many of these credits, the name Karin Azuma is associated with the voice actor Yukari Hirayama, suggesting it may be a performing alias used for specific types of roles.