Hiroshi Ohchi (Japanese: 大智 浩, Hepburn: Ōchi Hiroshi; 1908 – 1974) was a Japanese graphic designer as well as a visual designer best known for his work as the first art director of IDEA magazine. He also designed the logo for Idemitsu Kosan.
Source: “Hiroshi Ohchi”, English Wikipedia (CC BY-SA 4.0), excerpt