The śrāvaka disciples such as Ānanda, and Rāhula, who were guaranteed to be future Buddhas in the theoretical section of the Lotus Sūtra through the three cycles of the Buddha’s preaching (dharma, parable, and past relationships) had learned the Lotus Sūtra far in the past, 3,000 dust-particle kalpa (aeons) ago, from a bodhisattva who was the 16th prince of the Great Universal Wisdom Buddha, namely Śākyamuni Buddha today. Nevertheless, due to evil karma they abandoned the Lotus Sūtra, embracing such Mahayana sutras as the Flower Garland Sūtra, Wisdom Sūtra, Sūtra of Great Assembly, Nirvana Sūtra, Great Sun Buddha Sūtra, Revealing the Profound and Secret Sūtra, and Sūtra of Meditation on the Buddha of Infinite Life or Hinayana Āgama sutras. While doing so, they gradually declined in status to the realms of heavenly and human beings and finally to the three evil realms. As a result for as long as 3,000 dust-particle kalpa they spent much of their time in the Hell of Incessant Suffering, some of their time in the seven major hells, once in a long while in the other one hundred or so hells, and on rare occasions in the realms of hungry souls, beasts, and asura. It was after the 3,000 dust-particle kalpa (aeons) that they were able to be born in the realm of human or heavenly beings.

Kyōdai-shō, Letter to the Ikegami Brothers, Writings of Nichiren Shōnin, Volume 6, Followers I, Page 74-75