In Sōtō Zen, shikantaza—“just sitting”—is regarded as the central, foundational practice and as the clearest embodiment of the tradition’s understanding of enlightenment. Rather than serving as a technique aimed at producing a future awakening, this form of meditation expresses the view that practice and realization are not two separate stages but a single, unified reality. Wholehearted sitting is understood as the direct manifestation of Buddha-nature, which Sōtō Zen holds to be already present in all beings. Thus, shikantaza does not seek to construct a special state; it enacts a trust in inherent enlightenment by simply sitting as Buddha, here and now.

The distinctive character of shikantaza lies in its objectless, non-instrumental quality. There is no deliberate concentration on breath, mantra, visualization, or kōan; instead, the practitioner maintains an upright posture and an alert, open awareness. Thoughts, sensations, and emotions are allowed to arise and pass without grasping, rejection, or judgment. This uncontrived presence reflects core Mahāyāna and Zen themes such as emptiness and suchness, in which phenomena are met directly as they are, without the overlay of conceptual analysis or the drive to manipulate experience.

Because shikantaza is understood as the living expression of Buddha-nature, it naturally extends beyond the meditation hall into the fabric of daily life. The same non-grasping, attentive awareness cultivated in sitting is carried into walking, working, speaking, and relating to others. In this way, shikantaza is not treated as a specialized spiritual technique set apart from ordinary existence, but as a model for how awakening is embodied amid the most ordinary activities. It gives concrete form to the Zen insight that what is called enlightenment is not somewhere else or sometime later, but is realized in the simple, unadorned act of just sitting.