Tadashi Onishi (大西正) is a Japanese street photographer born in Tokyo. He calls himself a "serious photographer" rather than a professional and photographs everything around him from morning to night, at home and on the street, without setting a theme.
He founded the ROZOU Project, a street photography exhibition running since 2018, co-founded the collective VoidTokyo and is a member of the Stoneage crew. His books include Lost in Shinjuku (dotART, 2017), Shinjuku Parrot (2023) and the self-published Shinjuku Inco (2023), made with a pole dancer in a basement in Kabukicho.
In 2025 he showed Journey Inwards at Nikon Salon in Shinjuku. His awards include an Honorable Mention in Canon's Graphgate (2024) and first prize in the Trieste Photo Days book award (2017).
