Why Namu Myoho renge kyo is NOT the Eternal Buddha?

Namu Myoho renge kyo is not the Eternal Buddha because Nichiren Daishonin identifies the Eternal Buddha with "He".  For example:

“Now, when the Eternal Buddha was revealed in the essential section of the Lotus Sutra, this world of endurance (Saha-world) became the Eternal Pure Land, indestructible even by the three calamities of conflagration, flooding, and strong winds, which are said to destroy the world. It transcends the four periods of cosmic change: the kalpa of construction, continuance, destruction and emptiness. Sakyamuni Buddha, the Lord-preacher of this pure land, has never died in the past, nor will He be born in the future. He exists forever throughout the past present and future. All those who receive His GUIDANCE are one with this Eternal Buddha.” -- The True Object of Worship

"The saha world Shakyamuni revealed in the Juryo chapter is the eternal pure land, impervious to the three calamities and the four cycles of change. In this world the Buddha is eternal, transcending birth and death, and his disciples are also eternal. That is why the three thousand worlds or the three realms of existence are within our own lives. The Buddha did not reveal this truth in the first fourteen chapters of the Lotus Sutra because the time was not right and he found his disciples not yet able to grasp the truth." -- The True Object of Worship