Lifespan: Unknown to 12/22 of Eiroku 3 (1561) or 12/24 of Eiroku 5 (1563)
Other Names: Chikahide
Title: Governor of Inaba
Lord: Ii clan
Father: Okuyama Chikatomo
Siblings: Tomotoshi, sister (wife of Niino Chikanori)
Children: Tomomune, Tomoshige, Tomoie, Kanzaburō, Hiyo (wife of Ii Naochika), daughter (wife of Nakano Naoyoshi), daughter (wife of Ono Tomonao), daughter (wife of Saigō Iyo-no-kami), daughter (wife of Suzuki Shigetoki), daughter (wife of Suganuma Awaji-no-kami), daughter (wife of Hashimoto Shikata-no-suke), Otoku (wife of Hirata Morishige)
Okuyama Tomotoshi served as a bushō during the Sengoku period. A powerful figure from a cadet family of the Ii, Tomotoshi came from Iinoya in the Inasa District of Tōtōmi Province. He was also known as Chikahide.
Tomotoshi was a relative of the Ii clan who governed Iinoya. Many of his daughter wed members of the Ii family and their retainers. He was the maternal grandfather of Ii Naomasa.
Tomotoshi was assassinated by Ono Michiyoshi either toward the end of 1560 (the year that Imagawa Yoshimoto was killed at the Battle of Okehazama) or at the end of 1562.