Complex sentence: Japanese resistance to Hirohito was resistance by Japanese citizens during the Imperial reign of Hirohito, which encompassed his ascension to Prince regent on November 29,1921 to the Surrender of the Empire of Japan to the Allies on September 2,1945.
Split into simpler sentences: Japanese resistance to Hirohito was resistance by Japanese citizens to the Empire of Japan during the Imperial reign of Hirohito. His imperial reign encompassed his ascension to Prince regent on November 29,1921 to the Surrender of the Empire of Japan to the Allies on September 2,1945.