This letter was written at Minobu to the wife of the late lay priest Matsuno Rokurō Saemon who lived at Matsuno in Ihara District of Suruga Province. Their daughter had married Nanjō Hyōe Shichirō, and gave birth to nine children, among them Nanjō Tokimitsu. The lay priest and his wife are thought to have been converted to the Daishonin’s Buddhism through their relationship with the Nanjō family. Matsuno Rokurō Saemon died in 1278, the year before this letter was written.

At that time, disasters were frequent, and in particular, the famine that persisted through the autumn and winter of 1278 created untold misery. Despite this hardship, however, Matsuno’s wife made frequent offerings to the Daishonin. She appears to have done so even though she had not met him personally, and she continued to serve him in this way after her husband’s death. In praise of her sincere faith the Daishonin says, “Could it be that Shakyamuni Buddha has possessed your body, or were your roots of goodness from the past aroused?”

In this letter, Nichiren Daishonin first cites a passage from the “Peaceful Practices” chapter of the Lotus Sutra, which states how difficult it is to encounter the Lotus Sutra. Then he relates the story of the one-eyed turtle. The Daishonin elaborates on the story, explaining in detail the difficulty of a one-eyed turtle finding a floating piece of sandalwood with a hollow in it the turtle can fit into perfectly. Through this story, he shows how rare it is to meet the Lotus Sutra, and even more so to encounter the Law of Nam-myoho-renge-kyo that is the sutra’s essence.

Next the Daishonin traces the introduction of the Lotus Sutra from India to China and then to Japan. Although many people in Japan claim to embrace the Lotus, he says, “None of them, however, ever chant Nam-myoho-renge-kyo . . . nor do any of them urge others to chant it.” Thus, although people think that they believe in the Lotus Sutra, they do not embrace it correctly.

The final part of this letter refers to the Daishonin’s tenacious struggles during the more than twenty years since he first proclaimed Nam-myoho-renge-kyo. The Daishonin himself underwent all the persecutions that the Lotus Sutra says its votary in the Latter Day will face. Few people made any attempt to understand his teachings and many harassed him in various ways. This opposition, however, served only to strengthen his conviction that he was indeed the votary of the Lotus Sutra, whose activities are predicted in the “Encouraging Devotion” chapter. The letter concludes with praise for the sincerity of Matsuno’s wife.

https://www.nichirenlibrary.org/en/wnd-1/Content/130