The honzon (most venerable one) established in the 16th chapter of the Lotus Sūtra is Lord Śākyamuni Buddha, who has been closely tied with us in this Sahā World by the bond of cause and effect ever since attaining Buddhahood “500 (million) dust-particle kalpa” ago, and who is equipped with the eternal three bodies (Dharma, Reward, Accommodative Bodies) of the Buddha. “The Life Span of the Buddha” chapter refers to this as “the Buddha’s secret lore and divine powers,” which were explained by Grand Master T’ien-t’ai in his Words and Phrases of the Lotus Sūtra: “It is mysterious (pi) of one body being identical to a triple-body and confidential (mi) of a triple-body being identical to one body. It is mysterious because it has never been explained, and confidential because only the Buddha knew it. The Buddha has always been equipped with the three bodies attained in the eternal past throughout the past, present and future, but He has kept it confidential without ever revealing it in other sūtras. ”

Sandai Hiho Honjo-ji, The Transmission of the Three Great Secret Dharmas, Writings of Nichiren Shōnin, Doctrine 2, Page 289