The World of Ultimate Bliss actually refers to the Pure Land, and according to the teachings of different sutras and sects, the Pure Land can mean the Western World of Ultimate Bliss of the Buddha Amida, the Eastern World of Pure Emerald of the Buddha Bhaisajyaguruvaiduryaprabhasa, the Pure Land of the Amitayurdhyana Sutra, or many others.
極樂世界指的正是淨土，依不同經典及宗派所說，淨土可分為阿彌陀佛西方極樂世界、藥師佛東方淨琉璃世界、觀無量壽經淨土等等。