Okumura Masanobu (Japanese: 奥村 政信; 1686 – 13 March 1764) was a Japanese print designer, book publisher, and painter. He also illustrated novelettes and in his early years wrote some fiction. At first his work adhered to the Torii school, but later drifted beyond that. He is a figure in the formative era of ukiyo-e doing early works on actors and bijin-ga ("pictures of beautiful women").
While Masanobu's early life is largely undocumented, he is believed to have been born about 1686, possibly in Edo (modern Tokyo). Edo was a small fishing village when it was Tokugawa Ieyasu chose it as his administrative capital of the Tokugawa shogunate, and by the early 17th century the city had prospered and its population had grown to half a million.
Masanobu appears to have been self-taught; he is not known to have belonged to any artistic school. His early work shows the influence of the Torii school of ukiyo-e painting, particularly Torii Kiyonobu I, and he likely learned from the examples of Torii Kiyomasa and the early ukiyo-e artist Hishikawa Moronobu. A print album published by Kurihara Chōemon in 1701 depicting coutesans in the Yoshiwara pleasure district is Masanobu's earliest surviving signed work, followed by a similar work ten months later. Moronobu provided the illustrations, and sometimes text, for at least twenty-two ukiyo-zōshi novels and librettos for puppet theatre between 1703 and 1711. These included a modernized illustrated version of the 11th-century Tale of Genji in eighteen volumes, whose translation was by Masanobu.
After 1711 Masanobu's output of book illustrations shriveled as he turned his attention to albums of prints, usually about a dozen per set, on a variety of themes—most outstanding of which were the comic albums. These prints, influenced perhaps by 12th-century Toba-e and the caricature paintings of Hanabusa Itchō (1652–1724), depicted humorous scenes from, or parodies of, Noh, kabuki, and Japanese mythology. This period also saw Masanobu produce large kakemono-sized portraits of courtesans, whose designs had a warmth and humanity largely absent from the earlier Torii and Kaigetsudō beauties. The financial restraints of the Kyōhō reforms begun in 1717 brought an end to the luxury of these large prints, replaced by smaller hosoban-sized prints, which were often sold as triptychs—which when placed together were little smaller than the kakemono-sized prints. At least as early as 1718, Masanobu's were some of the earliest urushi-e prints, printed with brass powder sprinkled on the ink, which created a lacquer effect.