Āgama (Hinayana) sūtras were preached following the Flower Garland Sūtra. … Regarding what sūtras were preached after the Flower Garland Sūtra, the “Introductory” chapter of the Lotus Sūtra states, “To those who suffer, hating old age, sickness and death, the Buddha preaches the teaching of Nirvana, showing ignorant people the way to tranquility and extinction of worldly passions.” In the “Expedients” chapter of the same sūtra, it states, “The Buddha went to the Deer Park in Bārāṇasī Kingdom . . . and preached the dharma to five monks.” It is also stated in the Nirvana Sūtra, “The Buddha preached on the Middle Way in the Deer Park of the Bārāṇasī Kingdom. ” This indicates what sūtras were preached after the Flower Garland Sūtra. According to these scriptural statements, it seems clear that it was the Āgama sūtras for śrāvaka disciples which were expounded after the Flower Garland Sūtra for great bodhisattvas.

Shugo Kokka-ron, Treatise on Protecting the Nation, Writings of Nichiren Shōnin, Doctrine 1, Page 7-8