Expediential sūtras preached before the Lotus Sūtra are the same as non-Buddhist teachings, in which no one can be reborn in the Pure Land or attain Buddhahood. For instance, rivers which do not flow into the ocean cannot become one, and people and subjects who do not follow their great king cannot be united. No matter how hard we practice such teachings, there will not be any merit at all unless we reach the Lotus-Nirvana Sūtras; it will be the same as practicing the non-Buddhist teachings, in which Buddhahood is not attainable. They are the teachings nobody practices and no one can attain Buddhahood by practicing them in the Latter Age of Degeneration as well as during and after the lifetime of the Buddha.

Shugo Kokka-ron, Treatise on Protecting the Nation, Writings of Nichiren Shōnin, Doctrine 1, Page 25