noun
Operation Ketsugō; Japanese military plan for homeland defense
Historical term for the Imperial Japanese military's plan to counter an Allied invasion of the Japanese home islands during World War II.
決号作戦は、本土決戦に備えた日本軍の防衛計画だった。
Operation Ketsugō was the Japanese military's defense plan in preparation for a decisive battle on the homeland.
The name 決号 (Ketsugō) was a code name used by the Imperial Japanese military; the exact derivation of the code name is uncertain.