Kouichi Oohori (大堀 こういち, Ōhori Kōichi, born April 5, 1963, in Miyagi Prefecture, Japan) is a Japanese actor. He participated in Gekidan Kenko (now Nylon 100℃) from 1985 to 1992. Since his debut Oohori expanded his career in the stage, television, and cinema. He was part of Unit Hanakusons. Oohori also appear in stage shows with folk singer Shozo.