Seiji Tsutsumi (堤 清二, Tsutsumi Seiji; March 30, 1927 − November 25, 2013) was a Japanese businessperson, author and poet, also known by the pen names Takashi Tsujii (辻井 喬, Tsujii Takashi) and Ikuo Yokose (横瀬 郁夫, Yokose Ikuo).
Source: “Seiji Tsutsumi”, English Wikipedia (CC BY-SA 4.0), excerpt