The Saha-world is the world of the Original Buddha and is the eternal Pure Land, which is free from the three calamities and the four kalpa. In this eternal world, the Buddha never disappeared in the past, nor is He to appear in the future. In consequence, all living beings under the Buddha in the Saha-world are one with Him and eternal. It is because those who believe in the Lotus Sutra, live in the land where they have united themselves with the Buddha and attained the truth of “the three thousand existences in one thought.”
Realization of Buddhahood, Kanjin Honzon Sho