大成建設
was a Japanese entrepreneur who founded the "Ōkura-gumi" "zaibatsu", which later became the Taisei Corporation, and the "Ōkura Shōgyō Gakkō" ("Okura Commerce School") which later became Tokyo University of Economics in 1949. In contrast to most of the "zaibatsu", the Ōkura "zaibatsu" was founded by someone from the peasant class.