'Blocklist' was the US plan devised by General Douglas MacArthur’s South-West Pacific Area command for the unopposed landings at Yokosuka and on Kyushu, and the subsequent occupation of the Japanese home islands after the surrender of the Japanese empire, and by the Commander-in-Chief, Air Forces, Pacific, to occupy Japanese-held territory at the same time (2 September/22 October 1945).

The occupation of the area to the north of (and including) Tokyo was undertaken by Vice Admiral Theodore S. Wilkinson’s 3^rd Amphibious Force (headquarters ship Mount Olympus) and Lieutenant General Robert L. Eichelberger’s 8^th Army, and to the south by Vice Admiral Harry W. Hill’s 5^th Amphibious Force (headquarters ship Auburn) and Lieutenant General Walter C. Krueger’s 6^th Army.

In the 8^th Army’s zone, Lieutenant General Charles P. Hill’s XI Corps occupied the Tokyo area, Major General Oscar W. Griswold’s XIV Corps northern Honshu with the exception of Ominato, and Major General Major General Charles W. Ryder’s IX Corps the area around the Tsugaru Strait and Hokkaido. In the XI Corps' zone, TF33 disembarked Major General William C. Chase’s 1^st Cavalry Division at Yokohama on 2 September and on the following day the division’s 112^th Cavalry Regimental Combat Team was landed at Tateyama to secure Tokyo Bay. On 5 September the first reconnaissance of Tokyo was made and on 8 September the 1^st Cavalry Division entered the Japanese capital.

After the completion of the airlift of Major General Joseph M. Swing’s 11^th Airborne Division on 6 September, Major General George W. Griner’s 27^th Division was flown into Atsugi from Okinawa between 7 and 14 September. Between 8 and 10 September TF35 landed William H. Arnold’s Americal Division in Yokohama. On 14 September Major General Leonard F. Wing’s 43^rd Division followed but was then withdrawn on 27 September to return to the USA. The XIV Corps began the occupation of northern Honshu in Sendai on 15 September. The corps had the 11^th Airborne Division, which arrived at Sendai by land, and the 27^th Division, which travelled to Niigata. As relief, Major General Herman F. Kramer’s 97^th Division reached the Tokyo area on 20 September. In the IX Corps' zone on 6 September, Vice Admiral Frank J. Fletcher’s (from the middle of the month Rear Admiral Francis C. Denebrinck’s) North Pacific Force landed advance detachments of the Marine Corps in Ominato at the northern tip of Honshu. On 8 September minesweeping forces started on the clearance of the Tsugaru Strait. Between 25 and 27 September an amphibious group landed Major General Paul J. Mueller’s 81^st Division at Aomori on the eastern side of the Strait of Tsushima, and on 4 October the 306^th Regimental Combat Team was landed at Otaru on Hokkaido. The bulk of Major General Andrew D. Bruce’s 77^th Division followed on on 15 October to Otaru, and thence to Sapporo.

From 7 October the IX Corps established its headquarters in Sapporo.

In the zone allocated to the 6^th Army, Lieutenant General Harry Schmidt’s V Amphibious Corps occupied Kyushu, Major General Franklin C. Sibert’s X Corps Shikoku and southern Honshu, and Major General Innis P. Swift’s I Corps Honshu from the Kii Channel as far as the Shizuoka/Takaoka line. In the V Amphibious Corps' zone, the 127^th Regimental Combat Team of Major General William H. Gill’s 32^nd Division was delivered by air on 4 September to Kanoya at the southern tip of Kyushu. Rear Admiral Lawrence F. Reifsnider’s 4^th Amphibious Group landed Major General Thomas E. Bourke’s 5^th Marine Division in Sasebo on 22 October. On 22 September Major General LeRoy P. Hunt’s 2^nd Marine Division arrived in Nagasaki. On 15 October the rest of the 32^nd Division was landed at Shimonoseki and proceeded to Saga in central Kyushu. The operations were covered by a group commanded by Rear Admiral Morton L. Deyo.

In I Corps' zone, Rear Admiral Albert G. Noble’s 8^th Amphibious Group disembarked Major General Percy W. Clarkson’s 33^rd Division at Kobe on 25 September, Major General Arthur McK. Harper’s 98^th Division at Wakayama on 27 September and Major General Charles L. Mullins’s 25^th Division at Nagoya on 2 October. The headquarters of the 6^th Army was established in Kyoto, and that of the I Corps in Osaka.

In the zone of the X Corps, headquartered at Kure, Major General Jens A. Doe’s 41^st Division was landed by Rear Admiral Bertram J. Rodgers’s 11^th Amphibious Group at Kure on 22 September, and Commodore Ryan’s amphibious group landed Major General Roscoe B. Woodruff’s 24^th Division at Matsuyama on Shikoku on 7 October.