Day 17 covers all of Chapter 12, Devadatta, and opens Chapter 13, Encouragement for Keeping this Sutra.

Having last month witnessed the daughter of the dragon-king become a Buddha and concluded Chapter 12, Devadatta, we begin today’s portion of Chapter 13, Encouragement for Keeping this Sūtra, with Medicine-King Bodhisattva-mahāsattva and Great-Eloquence Bodhisattva-mahāsattva’s vow to uphold the Lotus Sūtra.

Thereupon Medicine-King Bodhisattva-mahāsattvas and Great-Eloquence Bodhisattva-mahāsattvas, together with their twenty-thousand attendants who were also Bodhisattvas, vowed to the Buddha:

“World-Honored One, do not worry! We will keep, read, recite and expound this sūtra after your extinction. The living beings in the evil world after [your extinction] will have less roots of good, more arrogance, more greed for offerings of worldly things, and more roots of evil. It will be difficult to teach them because they will go away from emancipation. But we will patiently read, recite, keep, expound and copy this sūtra, and make various offerings to it. We will not spare even our lives [in doing all this].”

Nichiren used this chapter’s prediction of the difficulty in spreading the dharma to explain the troubles he faced. For example, in his Letter to Hōren:

It is most important for a man of wisdom to spread the Lotus Sūtra by keeping the difference of time in mind. For instance, for those who are thirsty, water is just what is necessary, not a bow and arrow or arms. What is needed for a naked person is clothing, not water. One can understand the overarching principle through this one example. If a fierce god spreads the Lotus Sūtra, you should donate your own flesh to him because a fierce god is fond of flesh. It is useless to donate clothing or other food to him. If an evil king tries to destroy the Lotus Sūtra, never obey his order even at the cost of life. When high priests who observe the precepts and are devoted to the pursuit of faith pretend to spread the Lotus Sūtra outwardly, but try to destroy it inwardly, you must reprimand them vigorously. The Lotus Sūtra, “Encouragement for Upholding This Sūtra” chapter, admonishes us to, “Solely to venerate the Supreme Way without sparing one’s own life.” It is preached in the Nirvana Sūtra, “Even at the cost of life, one should not conceal the king’s orders.” Grand Master Chang-an interprets this in his Annotation on the Nirvana Sūtra, “The reason why it is said that even at the cost of life one should not conceal the teaching is because life is not as important as the Dharma. We must spread the Dharma even at the cost of life.”

Source

Day 16 concludes Chapter 11, Beholding the Stūpa of Treasures, and completes the Fourth Volume of the Sūtra of the Lotus Flower of the Wonderful Dharma.

Having last month witnessed Many-Treasures Buddha in the stūpa of treasures offer a half of his seat to Śākyamuni, we repeat in gāthās with Śākyamuni’s explanation of Many-Treasures Buddha in the stūpa of treasures and the Buddhas of the replicas.

Thereupon the World-Honored One, wishing to repeat what he had said, sang in gāthās:

The Saintly Master, the World-Honored One,
Who had passed away a long time ago,
Came riding in the stūpa of treasures
To hear the Dharma [directly from me].
Could anyone who sees him
Not make efforts to hear the Dharma?

It is innumerable kalpas
Since he passed away.
He wished to hear the Dharma at any place
Because the Dharma is difficult to meet.

His original vow was this:
“After I pass away,
I will go to any place
To hear the Dharma.”

The Buddhas of my replicas
As innumerable
As there are sands in the River Ganges
Also came here
From their wonderful worlds,
Parting from their disciples,
And giving up the offerings made to them
By gods, men and dragons,
ln order to hear the Dharma,
See Many-Treasures Tathāgata,
Who passed away [a long time ago],
And have the Dharma preserved forever.

I removed innumerable living beings from many worlds,
And purified those worlds
By my supernatural powers
In order to seat those Buddhas.

Those Buddhas came under the jeweled trees.
The trees are adorned with those Buddhas
Just as a pond of pure water is adorned
With lotus flowers.

There are lion-like seats
Under the jeweled trees.
Those Buddhas sat on the seats.
The worlds are adorned
With the light of those Buddhas as bright
As a great torch in the darkness of night.

Wonderful fragrance is sent forth
From the bodies of those Buddhas
To the worlds of the ten quarters.
The living beings of those worlds
Smell the fragrance joyfully,
Just as the branches of a tree bend before a strong wind.
Those Buddhas employ these expedients
In order to have the Dharma preserved forever.

Nichiren points out in his Open Your Eyes to the Lotus Teaching letter that all of this is preparatory for what’s coming in Chapter 16:

Now in the “Appearance of the Stupa of Treasures,” the eleventh chapter of the Lotus Sūtra, a step was taken in preparation for revealing the Eternal Buddha in the sixteenth chapter on “The Life Span of the Buddha.” It is stated in the “Appearance of the Stupa of Treasures” chapter that Śākyamuni Buddha, who had attained enlightenment for the first time only forty years or so before under the bodhi tree at Buddhagayā, India, called the crowd of Buddhas, who had obtained Buddhahood as far before as a kalpa or ten, “My manifestations.” This was against the principle of equality among Buddhas and greatly surprised everyone. If Śākyamuni Buddha had attained enlightenment only forty years or so before, large crowds of people all over the universe would not be waiting for His guidance. Even if He was capable of appearing in manifestation to guide them in various worlds, it would have been of no use. Grand Master T’ien-t’ai said in his Profound Meaning of the Lotus Sūtra, fascicle 9, “Since there are so many of His manifestations, we should know that He has been the Buddha for a long time.” It represents the consternation of the great assembly, men and gods who were surprised at the great number of Buddhas in manifestation (funjin).

Source

Day 7 concludes Chapter 3, A Parable, and begins Chapter 4, Understanding by Faith.

Having last month considered why the Buddha expounds only to people of profound wisdom this Sūtra of the Lotus Flower of the Wonderful Dharma, we consider the fate of those who scowl at this sūtra.

Some will scowl at this sūtra
And doubt it.
Listen! I will tell you
How they will be punished.

In my lifetime or after my extinction
Some will slander this sūtra,
And despise the person
Who reads or recites
Or copies or keeps this sūtra.
They will hate him,
Look at him with jealousy,
And harbor enmity against him.
Listen! I will tell you
How they will be punished.

When their present lives end,
They will fall into the Avici Hell.
They will live there for a kalpa,
And have their rebirth in the same hell.
This rebirth of theirs will be repeated
For innumerable kalpas.

Nichiren discusses the depths of hell in his Letter to Hōren:

QUESTION: What kind of hell do slanderers of the practicer of the Lotus Sūtra fall into?

ANSWER: The Lotus Sūtra, fascicle 2 (“A Parable” chapter), preaches, “Those who despise, hate, envy, and bear a grudge against a person who reads, recites, copies and upholds the Lotus Sūtra will fall into Avici Hell upon death. After suffering in this hell for as long as a kalpa, they will again die at the end of the kalpa and fall into the same hell to suffer. They will repeat this countless times and continue to suffer for innumerable kalpa (aeons).”

The palace of King Yama is located 500 yojana below the surface of the earth. Below the palace, between the depths of 500 and 1,500 yojana underground are located 136 hells such as the Eight Great Hells. 128 of the 136 hells are the abodes of minor criminals while the Eight Great Hells are the abodes of felons. Seven of the Eight Great Hells are for the offenders of the Ten Evil Acts while the last of the Eight Great Hells, the Hell of Incessant Suffering, is the abode of those who committed the Five Rebellious Sins, undutiful children, and slanderers of the Lotus Sūtra. To sum up, this passage cited from the “Parable” chapter of the Lotus Sūtra preaches that those who speak ill of or slander the practicer of the Lotus Sūtra in the Latter Age of Degeneration in this world even in jest must fall into the Hell of Incessant Suffering.

Hōren-shō, Letter to Hōren, Writings of Nichiren Shōnin, Volume 6, Followers I, Page 45

Day 5 begins Chapter 3, A Parable

Having last month heard Śāriputra’s dancing joy in gāthās, we consider Śāriputra’s fear that he was listening to Mara in the form of a Buddha.

In the midst of the great multitude,
You said to me, “You will become a Buddha.”
Hearing this truthful voice,
All my doubts are gone.

When I had heard this from you,
I was much frightened and perplexed; I thought:
“The Buddha troubles me.
Isn’t he Mara in the form of a Buddha?”

You skillfully expound the Dharma with various parables and similes,
And with various stories of previous lives.
Now my mind is as peaceful as the sea.
Hearing you, I have removed the mesh of doubts.

You said:
“The innumerable Buddhas in the past
Expounded the Dharma with expedients.
The numberless Buddhas at present
Also expound the Dharma
With expedients.
So will the countless Buddhas
In the future.”

You appeared in this world,
Left your home, attained enlightenment,
And now turn the wheel of the Dharma,
Also with expedients.

You expound the true teaching;
Papiyas does not.
Therefore, I know
That you are not a transformation of Mara.
I thought that the Dharma was expounded by Mara
Because I was in the mesh of doubts.

I hear your gentle voice.
Your voice is deep and wonderful.
You expound the Pure Dharma.
My heart is filled with great joy.
All my doubts are gone.
I have obtained true wisdom.

I shall become a Buddha without fail.
I shall be respected by gods and men.
I will turn the wheel of the unsurpassed Dharma,
And teach Bodhisattvas.

This expedient lesson is discussed by Nichiren in his letter on Genealogical Chart of the Buddha’s Lifetime Teachings in Five Periods:

When Śāripūtra, a man of the Two Vehicle considered unable to attain Buddhahood in the pre-Lotus sūtras, was guaranteed future Buddhahood, he expressed his astonishment in the third chapter, “A Parable,” “Is this not a devil pretending to be the Buddha, trying to trouble and confuse my mind?” The Buddha preaches in the fifth chapter, “The Simile of Herbs,” “Regarding this essential doctrine, I kept silent for a long time without revealing it at once.” These make clear that the sūtras preached before the Lotus Sūtra are all expedient; only the Lotus Sūtra is the True Dharma.

Ichidai Goji Keizu, Genealogical Chart of the Buddha’s Lifetime Teachings in Five Periods, Writings of Nichiren Shōnin, Doctrine 3, Page 243

Chapter 1, Introductory (Conclusion).

Having last month considered the teaching of the last Sun-Moon-Light Buddha, we consider Sun-Moon-Light Buddha’s preaching of the Lotus Flower of the Wonderful Dharma, the Dharma for Bodhisattvas, the Dharma Upheld by the Buddhas.

“Maitreya, know this! There were two thousand million Bodhisattvas in that congregation. They wished to hear the Dharma. They were astonished at seeing the Buddha-worlds illumined by this ray of light. They wished to know why the Buddha was emitting this ray of light.

“At that time there was a Bodhisattva called Wonderful-Light. He had eight hundred disciples. Sun-Moon-Light Buddha emerged from his samādhi, and expounded the sūtra of the Great Vehicle to Wonderful-Light Bodhisattva and others without rising from his seat for sixty small kalpas. It was called the ‘Lotus Flower of the Wonderful Dharma, the Dharma for Bodhisattvas, the Dharma Upheld by the Buddhas.’ The hearers in the congregation also sat in the same place for sixty small kalpas, and their bodies and minds were motionless. They thought that they had heard the Buddha expounding the Dharma for only a mealtime. None of them felt tired in body or mind. Having completed the expounding of this sūtra at the end of the period of sixty small kalpas, Sun-Moon-Light Buddha said to the Brahmans, Maras, śramaṇas, brahmanas, gods, men, and asuras, ‘I shall enter into the Nirvāṇa-without-remainder at midnight tonight.’

In Nichiren’s writings he explains that the teaching of the Lotus Sūtra took place in three assemblies over the last eight years of the Buddha’s teaching. From that we have today 28 chapters in eight volumes.

Bodhisattva Mañjuśrī and the Venerable Ānanda used the daimoku of Myōhō Renge Kyō to indicate the entirety of the teaching of the Lotus Sūtra in three assemblies over the period of the last eight years of the Buddha’s teaching; and to indicate that this is what they meant the sutra begins with the words “Thus have I heard.”

Source
What would a teaching that required sixty small kalpas look like? Myōhō Renge Kyō, of course.

Namu Myōhō Renge Kyō

Day 1 covers the first half of Chapter 1, Introductory

Having last month considered the offerings of the Bodhisattvas to stupa-mausoleums, we conclude today’s portion of Chapter 1, Introductory.

The worlds [of the Buddha] naturally become
As wonderful and as beautiful
As the [flowers] of the kingly tree
In full bloom on the top of Mt. Sumeru.
The multitude of this congregation and I
Can see the various wonderful things
Of those worlds
By the ray of light of the Buddha [of this world].

The supernatural powers of the Buddha
And his wisdom are rare.
He is illumining innumerable worlds
By emitting a pure ray of light.
We were astonished
At seeing [those worlds].

Mañjuśrī, Son of the Buddha!
Remove our doubts!
The four kinds of devotees
Are looking up with joy at you and me,
Wishing to know why this ray of light is emitted
By the World-Honored One.

Son of the Buddha, answer me!
Remove our doubts and cause us to rejoice!
For what purpose is the Buddha
Emitting this ray of light?

Does he wish to expound the Wonderful Dharma
Which he attained when he was sitting
At the place of enlightenment?
Does he wish to assure us of our future Buddhahood?

He shows us the worlds of the Buddhas
Adorned with many treasures.
We can see the Buddhas of those worlds.
This cannot be for some insignificant reason.

Mañjuśrī, know this!
The four kinds of devotees and the dragons
Are looking at you, thinking:
“What is he going to say?”

Nichiren’s writes about the great omens in the Introductory chapter:

Among all the Buddhist scriptures preached by the Buddha there is no sūtra which does not mention the trembling of the earth in six different ways. However, the shaking of the earth in six ways when the Buddha was about to expound the Lotus Sūtra was so striking that the living beings who gathered to listen to Him were all startled and it moved Bodhisattva Maitreya to ask what was happening, prompting Bodhisattva Mañjuśrī to answer. This shows that the omen for the preaching of the Lotus Sūtra was much greater and longer than the omens of other sūtras that the question concerning it was more difficult to respond to. Therefore, Grand Master Miao-lê states in his Annotations on the Words and Phrases of the Lotus Sūtra, fascicle 2, “Which Mahayana sūtra does not have the omens such as a crowd of living beings gathered together like a cloud, emitting of light from the forehead of the Buddha, the rain of flowers from the heaven, and trembling of the earth? However, they have never caused such a great concern as this.” This means that every sūtra has a preface before preaching the main discourse, but no preface is accompanied by such great omens like those that accompanied the preface of the Lotus Sūtra.

Zuisō Gosho, Writing on Omens, Writings of Nichiren Shōnin, Volume 6, Followers I, Page 122