Hikaru Shikoku (born 1956) is a Japanese writer from Hiroshima and the eldest son of the antiwar artist and poet Goro Shikoku. After graduating from Waseda University’s School of Letters, he joined Dentsu, where he held senior positions in marketing and business development and also served as a director of Dentsu Consulting. Since retiring, he has worked to preserve and introduce his father’s art through exhibitions, lectures, and edited collections. His representative work, “Hansen Heiwa no Shigajin Shikoku Goro,” traces how Goro Shikoku’s wartime service, internment in Siberia, and the atomic-bomb death of his younger brother shaped his paintings, poems, picture books, antiwar posters, and “street poems” displayed throughout Hiroshima.