Having listened to Lord Śākyamuni preach the Lotus Sūtra, various great bodhisattvas, the King of the Brahma Heaven, Indra, Sun God, Moon God, Four Heavenly Kings, and others have truly become His disciples. Since the Buddha considered them His own disciples, He sternly advised and commanded them as stated in the “Appearance of the Stupa of Treasures” chapter in the Lotus Sūtra: “The Buddha told the great crowd, ‘Anyone who would strive to uphold, read, and recite the sūtra after My death should make sworn statements in front of Me.'” And so those great bodhisattvas and others followed the Buddha just as a gale blows twigs of small trees, as “good fortune” grass is swayed by a gale, or rivers flow into an ocean.

However, since it had not been long since the preaching of the Lotus Sūtra had begun on Mt. Sacred Eagle, it seemed to them dream-like and unreal. Then appeared a Stupa of Treasures, which not only attested to the first half of the preaching of the Lotus Sūtra to be true but also prepared the way for the preaching of the latter half. Referring to all the Buddhas who appeared from all the worlds in the universe, the Buddha declared that they were all His own manifestations (funjin). Śākyamuni Buddha and the Buddha of Many Treasures took seats side by side in the Stupa that hung in the sky, appearing like the sun and the moon rising together up in the blue sky. A large crowd of men and gods appeared in the sky like constellations, while funjin Buddhas took lion-shaped thrones under jeweled trees.

Kaimoku-shō, Open Your Eyes to the Lotus Teaching, Writings of Nichiren Shōnin, Doctrine 2, Page 68-69