Kohei Yoshiyuki

was a Japanese photographer whose work included "Kōen" (, Park), photographs of people at night in sexual activities in parks in Tokyo. Prints from The Park are held in the collections of the Museum of Modern Art and Metropolitan Museum of Art, New York; San Francisco Museum of Modern Art (SFMOMA); Museum of Contemporary Photography, Chicago; and Museum of Fine Arts, Houston. Examples from the series were included in the exhibition Exposed: Voyeurism, Surveillance and the Camera at Tate Modern, SFMOMA and the Walker Art Center.

Life and work He attracted much attention in 1979 with his exhibition "Kōen" (, Park) at the Komai Gallery, Tokyo. The black and white photographs were presented in a book published in 1980 that is "nominally a soft-core voyeur's manual", with photographs of people at night in sexual activities in Shinjuku and Yoyogi parks (both in Tokyo), mostly with unknown spectators around them. The photographs were taken with a 35 mm camera, infrared film and a flash with a special filter. Gerry Badger and others have commented on how the photographs raise questions about the boundaries between spectator, voyeur and participant.

He died on 21 January 2022, at the age of 76.

Publications Dokyumento: Kōen (, Document: Park). Sebun Mukku 4. Tokyo: Sebun-sha, 1980. The Park. Stuttgart/Berlin: Hatje Cantz, 2007. . With an introduction by Yossi Milo, an essay by Vince Aletti, and a transcript of an interview between Yoshiyuki and Nobuyoshi Araki. The Park. Santa Fe, NM: Radius; New York City: Yossi Milo, 2019. . With an introduction by Yossi Milo, an essay by Aletti, and a transcript of an interview between Yoshiyuki and Araki. Includes new images and documentary materials. Tōsatsu! Sunahama no koibito-tachi: Uwasa no rabu airando sennyū satsueiki . Sandē-sha, 1983. . Middonaito fōkasu: Mayonaka no sekigaisen tōsatsu . Tokyo: Tokuma, 1989. . Yoshiyuki Kōhei shashinshū: Sekigai kōsen . Tokyo: Hokusōsha, 1992. .

Collections Yoshiyuki's work is held in the following permanent collections: Metropolitan Museum of Art, New York: 2 prints (as of 2 February 2022)

Group exhibitions Exposed: Voyeurism, Surveillance and the Camera, Tate Modern, London, 2010; San Francisco Museum of Modern Art, 2010–12; Walker Art Center, Minneapolis, 2011. Included work from The Park.