Oma Ichimura is the stage name of a Japanese freelance voice actress born on May 3, 1977, in Kanagawa Prefecture, Japan. Her birth name is Tomoko Omata. She is formerly affiliated with the talent agency Office CHK.

Ichimura has built a diverse career spanning television anime, original video animations (OVAs), and video games. She is known for providing voices for a wide range of characters across different genres. In 2010, she voiced the character Miriam in the television anime series Blessing of the Campanella, a role she also reprised for the series' OVA the following year. Her work in the romance and drama genre includes the role of Nagisa Takawashi in the OVA series After... The Animation.

Ichimura has also been active in anime adapted from visual novels. She played Angelina Nanatsu Sewell in the 2011 television series Mashiroiro Symphony - The color of lovers, after voicing the character in the series' drama CD and PSP game adaptations. Another notable role in this area is Yukiko Hirohara in the 2009 television series 11eyes and its related OVA and video game adaptations.

Her filmography also includes roles in various OVA productions. She is credited as Akina Kajiwara in Kyōiku Shidō The Animation, Mao Saeki in Shitai o Arau: The Animation, Chihiro Shirakawa in Sore de mo Tsuma o Aishiteru, Ami Miyasawa in Stringendo - Angel-tachi no Private Lesson, Nana Ogawa in Sex Starved Nurses, and Minako Kurokawa in Lesbian Ward. For some of these roles, she has been credited under different names, such as Haruka Toumi for the role of Akina Kajiwara and Nana Sanjuusan for the role of Chihiro Shirakawa.

In addition to these, Ichimura has taken on other significant television roles. She portrayed Aya Hoshino in the 2001 series Super GALS! Kotobuki Ran, Uribo in the 2006 series Himawari!, and Sakuya in the 2005 series Izumo: Takeki Tsurugi no Senki. She has had recurring roles in long-running franchises as well, such as providing voices for multiple characters in the Ojamajo Doremi series and its sequels, and appearing in various installments of the Pretty Cure and Digimon franchises. Another recurring role is that of the character Jun'iku (Xun Yu) in the Koihime Musō television series and its associated OVAs.

Beyond her on-screen work, Ichimura has been involved in other areas of voice acting. She has voiced characters in video games, including Alma Wade in the Japanese version of the game F.E.A.R., and Rin Asakura for the drama CD of The World of Narue. In July 2006, she collaborated with fellow voice actresses Sakurai Harumi and Asai Harumi to produce and perform in their own internet radio show titled studio TeaParty, where her nicknames included Oma-chan and Oma-shochō.