Day 9 covers Chapter 5, The Simile of Herbs, and introduces Chapter 6, Assurance of Future Buddhahood.

Having last month concluded Chapter 5, The Simile of Herbs, we begin Chapter 6, Assurance of Future Buddhahood and the prediction of future Buddhahood of Mahā-Kāśyapa.

Thereupon the World-Honored One, having sung these gāthās, said to the great multitude [of bhikṣus]:

“This Mahā-Kāśyapa, a disciple of mine, will see three hundred billions of Buddhas, of World-Honored Ones, make offerings to them, respect them, honor them, praise them, and expound an innumerable number of their great teachings in his future life. After that, on the final stage of his physical existence, he will become a Buddha, called Light, the Tathāgata, the Deserver of Offerings, the Perfectly Enlightened One, the Man of Wisdom and Practice, the Well-Gone, the Knower of the World, the Unsurpassed Man, the Controller of Men, the Teacher of Gods and Men, the Buddha, the World-Honored One. His world will be called Light-Virtue; and the kalpa in which he will become that Buddha, Great-Adornment. The duration of the life of that Buddha will be twelve small kalpas. His right teachings will be preserved for twenty small kalpas, and the counterfeit of his right teachings will be preserved also for twenty small kalpas. His world will be adorned, and not be defiled with tile-pieces, rubble, thorns or dirt. The ground [of his world] will be even, and devoid of pits and mounds. It will be made of lapis lazuli. Jeweled trees will stand in lines, and the roads will be marked off by ropes of gold. Jeweled flowers will be strewn all over the ground, and the ground will be purified. Many hundreds of thousands of millions of Bodhisattvas and innumerable Śrāvakas will live in that world. Although Mara and his followers also will live there, they will not do any evil but protect the teachings of the Buddha.”

Here’s something Nichiren offered about Mahā-Kāśyapa:

Venerable Mahā-Kāśyapa was the most honorable priest in the world Jambudvīpa), second only to the Buddha. As a layman he was a wealthy person with 60 warehouses, each of which contained 140 koku (about 500 metric tons) of gold. He owned other treasures, too numerous to count. Asked about the previous life of Mahā-Kāśyapa and how he became such a wealthy person, Śākyamuni Buddha answered, “With the merit of offering a bowl of rice mixed with barley to a pratyekabuddha during a famine in the past, Mahā-Kāśyapa was reborn in the Trāyastriṃsá Heaven 1,000 times. Then he encountered Śākyamuni in this life, becoming foremost among His disciples, and was guaranteed to be a Buddha named Light Buddha in the future.” Thus it is stated by Grand Master T’ien-t’ai in his Words and Phrases of the Lotus Sutra, fascicle one.

Nanjō-dono Gohenji, Reply to Lord Nanjō , Writings of Nichiren Shōnin, Volume 7, Followers II, Pages 12-13