No, Japan was not ready to surrender…
Not true.
Aside from being genocide, a war crime, a crime against humanity and immoral, - the dropping of the A-Bomb was not necessary because as Henry H. (“Hap”) Arnold, commanding General of the Army air forces, declared in his 1949 memoirs: “It always appeared to us, atomic bomb or no atomic bomb, the Japanese were already on the verge of collapse.”
Further, the Japanese had already offered to surrender on January 20, 1945 according to terms which were almost identical to the ones signed in September:
The terms included:
• Complete surrender of all Japanese forces and arms, at home, on island possessions, and in occupied countries.
• Occupation of Japan and its possessions by Allied troops under American direction.
• Japanese relinquishment of all territory seized during the war, as well as Manchuria, Korea and Taiwan.
• Regulation of Japanese industry to halt production of any weapons and other tools of war.
• Release of all prisoners of war and internees.
• Surrender of designated war criminals.
Roosevelt received this 40 page memorandum outlining the terms of the conditional surrender of Japan. See: Hiroshima: Assault on a Beaten Foe," National Review, May 10, 1958