This article, an elaboration on The Desperate Diplomat (2016), reexamines Japanese Special Envoy Kurusu Saburo’s mission to the United States before Japan attacked Pearl Harbor on 7 December 1941, presenting a new “concurring opinion” in support of his innocence. The u.s. government firmly believed that Kurusu had been informed of the impending attack prior to coming to the United States and thus acted as a smoke screen. And so, the myth of the deceitful ambassador was born. Nevertheless, Kurusu insisted that he had no prior knowledge of Japan’s military action. Misunderstanding of his role in the Pearl Harbor attack and harsh remarks about it upset him. Utilizing Kurusu’s unpublished and previously unused materials in both Japanese and English housed in the National Diet Library in Tokyo, records from the International Military Tribunal for the Far East, and The Desperate Diplomat, based on his original memoir, this article helps Kurusu tell his side of the story to initiate scholarly debate on this insufficiently researched diplomat. This reassessment also presents excerpts from Kurusu’s unpublished personal correspondences with E. Stanley Jones, Bernard M. Baruch, and Joseph C. Grew.