Kohei Yoshiyuki was a young commercial photographer in Tokyo during the 1970s. When he was walking through Chou Park in Shinyuko one night, he noticed a couple making out on the ground and spectators in the bushes spying on them. He couldn’t make photos because it was dark, so back home he began researching and found out that Kodak made infrared flashbulbs.
He then returned to the park when he had his gear and throughout the 1970s, he photographed heterosexual and homosexual couples engaging in sexual activity and the peeping toms stalking them.
The photographs have been exhibited first in 1979, at Komai Gallery in Tokyo. For that show the pictures were blown up to life size, the gallery lights were turned off, and each visitor was given a flashlight. Mr. Yoshiyuki wanted to reconstruct the darkness of the park.