Excerpts from Books and Wikipedia
"Invasion marked the final offensive of World War II, the cost of which influenced the decision to use atomic weapons. . . . Some 150,000 Okinawans died, approximately one-third the island's population. . . . Of the 119,000 or so Japanese soldiers, as many as 112,000 were killed in the battle or forever sealed inside a collapse cave or bunker. . . . Collectively, the defenders lost more dead than the Japanese suffered in the two atomic bombings combined." [Davis: 100 Decisive Battles, p. 407] "In 1995, the Okinawa government erected a memorial monument named the Cornerstone of Peace in Mabuni, the site of the last fighting in southeastern Okinawa. The memorial lists all the known names of those who died in the battle, civilian and military, Japanese and foreign. As of June 2008, it contains 240,734 names." [Wikipedia] "It was only after the Battle of Okinawa had been fought and horribly lost, leaving huge sections of more than sixty Japanese cities leveled by American incendiary air attacks, that Hirohito indicated his desire for peace and started looking for ways to end the war." [Hirohito, p. 493]