Herbie Hancock promotes Ikedaism NOT the Lotus Sutra Buddhism of Nichiren

"Yeah. It really is cool. And it’s very open. That’s the other thing about this Buddhism, it’s not exclusive; it’s inclusive. It doesn’t say that any other religions are wrong and it’s my way or the highway. Nothing like that. I don’t feel like I have rejected Christianity or Judaism or Islam. I feel like I’ve embraced the truth that’s in everything. Because there is truth in all of those pursuits. And others, too. It’s a great way to feel." -- Herbie Hancock

Nichiren teaches:

"It is said that good medicine tastes bitter. This sutra, which is like good medicine, dispels attachments to the five vehicles and establishes the one ultimate principle. It reproaches those in the ranks of ordinary beings and censures those in the ranks of sagehood, denies [provisional] Mahayana and refutes Hinayana. It speaks of the heavenly devils as poisonous insects and calls non-Buddhists demons. It censures those who cling to Hinayana teachings, calling them mean and impoverished, and it dismisses bodhisattvas as beginners in learning. For this reason, heavenly devils hate to listen to it, non-Buddhists find their ears offended, persons of the two vehicles are dumbfounded, and bodhisattvas flee in terror. That is why all these types of people try to make hindrances [for a practitioner of the Lotus Sutra]. The Buddha was not speaking nonsense when he declared that hatred and jealousy would abound.” -- Opening of the Eyes

and

“In all the Buddha’s lands of the universe there is but one supreme vehicle, not two or three, and it excludes the provisional teachings of the Buddha.” -- On Practicing the Buddha's Teachings 

Let alone the non-Buddhist teachings, Herbie