Nichiren Buddhism fully affirms impermanence as a basic truth of existence, recognizing that all conditioned phenomena—bodies, emotions, relationships, and social conditions—are transient and constantly changing. This traditional Buddhist insight is not rejected or minimized; rather, it is taken as the starting point for practice. Worldly success and suffering alike are understood as unstable and fleeting, and even religious forms that do not embody the ultimate teaching are seen as subject to change. In this view, impermanence is not merely a philosophical idea but the lived reality of every moment.

At the same time, Nichiren Buddhism reads impermanence through the lens of the Lotus Sutra, which reveals an eternal dimension within this changing world. While external conditions rise and fall, the Buddha nature within all beings is regarded as enduring, and the fundamental law of life expressed as Nam‑myōhō‑renge‑kyō is understood as eternal and unchanging. The Buddha is not seen only as a historical figure, but as possessing an eternal life span, and this points to a deeper stratum of reality that persists amid flux. Thus, impermanence and eternity are not set in opposition but held together as two aspects of the same life.

Because everything is impermanent, Nichiren Buddhism treats this truth as a powerful spur to practice rather than a cause for despair. Death can come at any time, and circumstances can shift without warning, so one is urged to establish faith in the Lotus Sutra and chant Nam‑myōhō‑renge‑kyō without delay. Impermanence becomes a constant reminder that postponing spiritual effort is itself a risky illusion. The very instability of life thus sharpens awareness of what is truly essential and directs attention to the cultivation of faith.

Impermanence is also understood as the very condition that makes transformation possible. Since all phenomena are in flux, suffering and negative karma are not fixed destinies but can be redirected through faith, practice, and study. By aligning life with the Mystic Law, practitioners seek to transform adverse conditions into causes for growth, benefit, and the awakening of Buddhahood in this lifetime. In this way, impermanence is not treated as a nihilistic void but as a dynamic field in which the potential for enlightenment can be actualized.

From this standpoint, the changing realities of daily existence are not something to escape but the very arena in which the “true aspect of all phenomena” is revealed. Each impermanent event, when illuminated by faith in the Lotus Sutra, is seen as containing the potential for Buddhahood. Rather than turning away from the flux of ordinary life, Nichiren Buddhism encourages engaging it fully, trusting that within the rise and fall of every moment operates an indestructible Buddha nature and an eternal law.