[T]he Lotus Sutra was expounded in accordance with the Buddha’s true heart and intention. In Chapter 21 of the Lotus Sutra is says:

“All the teachings of the Tathāgata, all the unhindered, supernatural powers of the Tathāgata, all the treasury of the hidden core of the Tathāgata, and all the profound achievements of the Tathāgata are revealed and expounded explicitly in this sutra.” (Murano, p.294)

Thus, the Lotus Sutra is equal to the Buddha himself.

The Buddha is also included in the five characters of Myo Ho Ren Ge Kyo, which is the Chinese title of the Lotus Sutra. Nichiren Shōnin said:

“A name has virtue representing its body.” (Jissh ō-shō, WNS2, p.4).

Therefore, the five [Chinese] characters of the Odaimoku are equal to the whole Lotus Sutra.