Shizuka Okohira is a Japanese voice actor and actress born on October 6, 1968, in Hiroshima Prefecture. She is affiliated with the talent agency OgiPro THE NEXT. Her career began in 1996, and she quickly became a familiar presence in long-running television anime, providing voices for a wide array of supporting and recurring characters.

Okohira is particularly known for voicing mature female characters, including mothers, grandmothers, and figures of authority. Her most iconic and long-running role is Sumire Ryuzaki, the veteran coach in the popular sports anime The Prince of Tennis, a character she has portrayed across the original television series, numerous original video animations, and theatrical films. Another significant and recurring role is Oryou Sonozaki, the formidable matriarch of the Sonozaki family in the horror mystery franchise Higurashi: When They Cry. She has voiced this character in multiple anime adaptations, including the original series, its sequel Kai, the OVA Kira, and the 2020 series Gou.

In addition to these signature roles, Okohira has built an extensive filmography by voicing a diverse range of characters. She has been a staple in the long-running comedy series Kochikame, voicing numerous characters including Ayame Ryoutsu, the mother of the protagonist. Her other notable anime credits include roles in Rurouni Kenshin, Ojamajo Doremi, Digimon Tamers (as Babamon), Gunslinger Girl, Mushi-Shi, and Natsume's Book of Friends. The specific examples mentioned are all confirmed roles: Kazari Otogi in Nanbaka, Oryō in the Higurashi no Naku Koro ni Kai: Ura☆Higu OVA, Oryou Sonozaki in Higurashi no Naku Koro ni Kira, and the Old Woman in the OVA Anime Koten Bungaku Kan.

Beyond voice acting, Okohira has experience in stage performances and has also worked as a lecturer, sharing her expertise in voice acting. She is known for her versatile skills in sewing, knitting, drumming, and singing. Her work is characterized by a warm yet versatile vocal style that allows her to portray characters ranging from strict matriarchs to comical elderly women.