Day 30 covers all of Chapter 26, Dhāraṇīs
Having last month received Vaiśravaṇa Heavenly-King’s dhārāni spells, we receive World-Holding Heavenly-King’s dhārāni spells.Thereupon World-Holding Heavenly-King, accompanied by thousands of billions of nayutas of gandharvas who were surrounding him respectfully, came to the Buddha, joined his hands together, and said to him, “World-Honored One! I also will protect the keeper of the Sūtra of the Lotus Flower of the Wonderful Dharma with dhārānis, with divine spells.”
Then he uttered spells,” Akyanei (1), kyanei (2), kuri (3), kendari (4), sendari (5), matōgi (6), jōguri (7), furoshani (8), atchi (9).”
[He said to the Buddha:]
“World-Honored One! These dhārānis, these divine spells, have already been uttered by four thousand and two hundred million Buddhas. Those who attack and abuse this teacher of the Dharma should be considered to have attacked and abused those Buddhas.”
Nichiren offers this on the Dhārāṇi chapter:
The Dhārāṇi chapter states that two bodhisattvas, two heavenly kings and ten female rākṣasa demons will protect the practicer of the Lotus Sūtra. The two bodhisattvas are the Bodhisattva Medicine King and the Bodhisattva Brave Donor. The two heavenly kings are Vaiśravaṇa and Dhṛtarāṣṭra. The ten female rākṣasa demons are ten great demons, mothers of all demons in the four quarters of the world. Their mother is Hāriti.
They eat men after the custom of demons. A man’s body is composed of thirty-six substances such as excrement, urine, spittle, flesh, blood, skin, bone, five viscera and six entrails, hair, breath, and spirit. Inferior demons feed on excrement and the like. Mediocre demons feed on bones and the like. Superior demons feed on spiritual essence. The ten female rākṣasa demons have supreme qualities and thus feed on man’s spiritual essence. They are the great demons of epidemic.
Nichinyo Gozen Gohenji, A Response to My Lady Nichinyo, Writings of Nichiren Shōnin, Volume 4, Faith and Practice,
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