The Gosho

Nichiren's career in thirteenth century Japan was marked by repeated confrontation with both religious rivals and the Kamakura shogunate, including exile to the Izu peninsula, a near-execution at Tatsunokuchi that he and his followers read as a miraculous escape, and a further exile to the remote island of Sado. Much of the Gosho was written during these hardships, addressed to specific named disciples and lay followers offering guidance, encouragement and doctrinal instruction under real and immediate pressure, giving the collection a personal, occasional character quite different from a systematically composed treatise. Its central teaching holds the Lotus Sutra to be the sole complete vehicle for liberation in the current degenerate age, mappo, expressed practically through the chanted invocation Nam-myoho-renge-kyo, the daimoku. The collection mixes short personal letters with longer formal treatises, most famously the Rissho Ankoku Ron, an appeal to the Kamakura authorities arguing that the country's troubles stemmed from following false Buddhist teachings rather than the Lotus Sutra alone.

Nichiren also wrote extensively on the Lotus Sutra's own claim that it alone, among all the Buddha's teachings, was suited to guide beings through the degenerate final age, a reading that placed his own writings, by extension, in the position of authoritative commentary on what he held to be Buddhism's single complete teaching.

Nichiren's scattered letters and treatises were gathered and preserved by his successors after his death, and different Nichiren denominations that developed in the centuries following, including Nichiren Shoshu and the lay organization Soka Gakkai that grew out of it, transmit differing collections and translations, with disagreement over which individual letters are authentically Nichiren's own writing and which were later attributed to him. Despite that unresolved textual question at the margins, the Gosho functions today as devotional and doctrinal reading across the Nichiren family of traditions, studied alongside chanted portions of the Lotus Sutra itself rather than treated as a secondary commentary beneath it. Its role is closer to how the Gospels function for Christians who also hold an Old Testament than to a straightforward commentary tradition, in that the Gosho carries independent devotional weight for the communities that read it as the direct teaching of their founder rather than as explanatory material standing beneath the Lotus Sutra it constantly interprets. Modern critical editions produced by different denominational bodies sometimes translate identical letters differently or include different supplementary material, so a reader's choice of edition can itself signal denominational affiliation within the wider Nichiren tradition.