Paul Nobuo Tatsuguchi (辰口 信夫, Tatsuguchi Nobuo), sometimes mistakenly referred to as Nebu Tatsuguchi (August 31, 1911 – May 30, 1943), was a surgeon in the Imperial Japanese Army (IJA) during World War II. He was killed during the Battle of Attu on Attu Island, Alaska, United States on May 30, 1943. Throughout the ensuing battle, Tatsuguchi kept a diary in which he recorded its events and his struggle to care for the wounded in his field hospital. He was killed on the battle's final day after the remaining Japanese conducted one last, suicidal charge against the American forces.