OL Shinkaron (OL進化論 Ōeru Shinkaron) is a yonkoma manga series by Akizuki Risu about OLs, or office ladies. It also had a short, spin-off series titled Okusama Shinkaron that focused on housewives. Several volumes of OL Shinkaron have been published by Kodansha in a Japanese/English bilingual edition titled Survival in the Office: The Evolution of Japanese Working Women. In 2004, the manga, along with her other works, won Risu the Short story Award at the Tezuka Osamu Cultural Prizes.