was a Japanese columnist, photographer, and pundit. After failing the entrance exams for the University of Tokyo and the University of Tsukuba, Katsuya entered Waseda University in 1980. He started working for an editor of Bungeishunjà « after graduating from the university in 1985.
On July 2, 2017, he was a candidate in the , but was defeated by incumbent Toshizà  Ido who won his fifth term.
He died of alcoholic hepatitis on November 28, 2018.