Shakyamuni Buddha and Buddha-nature

“…Shakyamuni Buddha, within our minds, is an ancient Buddha without beginning, manifesting Himself in three bodies who attained Buddhahood in the eternal past..." (Kanjin Honzon Sho)

Of all the Three Thousand Worlds present in a momentary existence of life, Nichiren only gives a personal name to one world, the World of Buddha ["Shakyamuni Buddha"]. Therefore, SGI's assertion that the Eternal Buddha is merely Buddha-nature, is untenable. Shakyamuni Buddha within our lives is the totality of Ichinen Sanzen. He is another name for Gohonzon.