They had nothing left. What was USA frightened of. Just bomb them conventionally. No need for atomic bombs. All they needed was time. They did surrender one week after the second atomic bomb. They would of surrendered if it was dropped or not.
Order of battle... Kyushu
Japan
Second General Army (Field Marshal Shunroku Hata)
16th Area Army (Lt. Gen. Yokoyama Isamu) (600,000 men)
Northern Kyūshū—56th Army (Lt. Gen. Ichiro Shichida) (365,000)[2]
145th Division
312th Division
351st Division
124th Independent Mixed Brigade
57th Division (20,000 men)
4th Tank Brigade
Southeastern Kyūshū—57th Army (Lt. Gen. Nishihara Kanji) (150,000 men):
Tanegashima—109th Independent Mixed Brigade (5,900 men)
Miyazaki—154th Division, 156th Division, 212th Division[2] (55,000 men)
Ariake—86th Division, 98th Independent Mixed Brigade, 1 regiment, 3 infantry battalions (29,000 men)
25th Division, 5th Tank Brigade, 6th Tank Brigade[2]
Southwestern Kyūshū—40th Army (Lt. Gen. Nakazawa Mitsuo) (85,000 men):
303rd Division (12,000 men) (Sendai)
206th Division (Fukiage)
146th Division, 125th Independent Mixed Brigade (S. Satsuma Peninsula)
77th Division[2] 1 tank regiment
216th Division[2] 4 brigades
Air General Army (Gen. Masakazu Kawabe)
Sixth Air Army — Kyūshū
5,000 aircraft assigned as kamikazes, 5,000 aircraft available for kamikaze service, 7,000 aircraft in need of repair
100 Koryu-class midget submarines, 250 Kairyu-class midget submarines, 1,000 Kaiten manned torpedoes, 800 Shinyo suicide boats
Yep... Nothing