Kohei Yoshiyuki (吉行耕平, Yoshiyuki Kōhei, 1946 – 21 January 2022) was a Japanese photographer whose work included "Kōen" (公園, Park), photographs of people at night in sexual activities in parks in Tokyo.
[3][4][5][6][7] Examples from the series were included in the exhibition Exposed: Voyeurism, Surveillance and the Camera at Tate Modern, SFMOMA and the Walker Art Center.
[8] He attracted much attention in 1979 with his exhibition "Kōen" (公園, 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",[9] with photographs of people at night in sexual activities in Shinjuku and Yoyogi parks (both in Tokyo), mostly with unknown spectators around them.
[6][11][12][13] Gerry Badger and others have commented on how the photographs raise questions about the boundaries between spectator, voyeur and participant.