Short answers, pulled from the story.
The Battle of Okinawa lasted 82 days, from the 1st of April 1945 to the 22nd of June 1945. The initial landing on the 1st of April was the largest amphibious assault in the Pacific Theater of World War II. The official surrender ceremony was held on the 7th of September 1945, near Kadena Airfield.
As of 2023, the Cornerstone of Peace monument at the Okinawa Prefectural Peace Memorial Museum lists 242,046 names, including 149,634 Okinawans, 77,823 Imperial Japanese soldiers, and 14,010 Americans. The Americans suffered some 48,000 casualties overall, and the battle caused more than twice the number of American casualties than the Guadalcanal Campaign and Battle of Iwo Jima combined.
Operation Iceberg was the codename for the Battle of Okinawa, the Allied assault on the island of Okinawa in 1945. It was the largest amphibious assault in the Pacific Theater of World War II, launched on the 1st of April 1945, and was intended to secure a staging point for the planned invasion of the Japanese home islands.
The Battle of Okinawa was called the "typhoon of steel" in English, and "tetsu no bōfū" in Japanese, because of the ferocity of the fighting, the intensity of Japanese kamikaze attacks, and the enormous volume of Allied vessels and armored vehicles involved in the assault. It was the bloodiest and fiercest battle in the Pacific Ocean Theatre.
Between the 6th of April and the 22nd of June 1945, the Japanese flew 1,465 kamikaze aircraft in large-scale attacks from Kyushu, plus 185 individual kamikaze sorties from Kyushu and 250 from Taiwan. Seven major kamikaze attacks involved more than 1,500 planes total. The kamikaze effort caused the US Navy to suffer more casualties than in any previous engagement in the Atlantic or Pacific.
Local authorities recorded that at least 149,425 Okinawan people were killed, died by coerced suicide, or went missing. The Imperial Japanese Army used civilians as human shields, confiscated food, and killed those who hid it. Thousands of civilians committed mass suicide after being told by Japanese soldiers that American troops would torture them. The Osaka Prefecture Court ruled in 2008 that the military was deeply involved in the mass suicides.