is a Japanese photojournalist. Ōishi was born in Suginami-ku, Tokyo on 28 May 1944. Seeing Melanesian art while at Nihon University had a big effect on her, as did a visit to Vietnam and Cambodia in 1966. After graduating in photography, she became a freelance photojournalist, working in west Africa, southeast Asia, and Europe. In 1971 she held an exhibition in the Nikon Salon of photographs of a Ghanaian child growing up in Nagano; she then spent three years photographing New Guinea. She worked on portraiture, and documented the effects of the Khmer Rouge in Cambodia, the effects of wartime dioxin in Vietnam, perestroika in the Soviet Union, and more. Ōishi's work on Vietnam won her the Domon Ken Award. In both 1982 and 1989 she won the Annual Award from the Photographic Society of Japan. She has taught at Tokyo Polytechnic University. Her work is in the permanent collection of the Tokyo Metropolitan Museum of Photography. Books by Ōishi Itoshi no Nyūginia (). Tokyo: Gakushū-kenkyūsha, 1978. On New Guinea. Hana modashi: Ōishi Yoshino shashinshū (). Tokyo: Buronzu-sha, 1979. Onna no kuni ni natta Kanbojia (). Tokyo: Ushio Shuppansha, 1980. On Cambodia. Mukoku no tami: Kanbojia no shōgen (). Tokyo: Iwanami Shoten, 1981. On Cambodia. Papua-jin: Ima seki-jidai ni ikiru (). Tokyo: Heibonsha, 1981. On Papua. Wani no tami: Meraneshia geijutsu no hitobito (). Tokyo: Tōjusha, 1983. On Melanesia. Shōnen Papanī (). Tokyo: Yayoi Shobō, 1983. On a Ghanaian child in Nagano. Oki no kuni (). Tokyo: Kumon Shuppan, 1984. . On the Oki islands. Shōgen suru tami: Jūnen ato no Betonamu sensō (). Tokyo: Kodansha, 1984. . On Vietnam. Okinawa ni ikiru (). Tokyo: Yōbisha, 1986. On Okinawa. Okinawa no genzō: Uchi to soto no sōkoku (). Naha: Nirai-sha, 1988. . With Masanori Nakahodo (). On Okinawa. "Yoru to kiri" o koete: Pōrando kyōsei shūyōjo no seikansha-tachi (). Tokyo: NHK, 1988. . On the survivors of German Nazi concentration camps in occupied Poland during World War II. Yoru to kiri wa ima () / Those Who Survived the Concentration Camps. Tokyo: Yōbisha, 1988. . Sobieto henreki: Ōishi Yoshino shashinshū (). Tokyo: NHK, 1991. . On the Soviet Union. Kanashimi no Sobieto: Minzoku o aruku (). Tokyo: Kodansha, 1991. . On the Soviet Union. Ano hi, Betonamu ni kare-hazai ga futta: Sensō no kizu-ato o mitsumetsuzuketa shinjitsu no kioku (). Tokyo: Kumon Shuppan, 1992. . On Vietnam. Okinawa: Datsuwa no