Taisen Deshimaru’s central teaching is the primacy of shikantaza, “just sitting” zazen, as the complete expression of the Way. Zazen, in this perspective, is not a technique deployed to obtain some later enlightenment; rather, the very act of sitting upright, breathing naturally, and remaining present is itself the manifestation of Buddha-nature. Enlightenment is not treated as a distant goal but as something already implicit in the simple, concrete act of sitting. In this sense, zazen is both path and fruition, practice and realization at once.

Within this teaching, posture, breathing, and mental attitude form an indivisible unity of body and mind. The practitioner is encouraged to sit without seeking anything: no special visions, no altered states, no spiritual trophies. By relinquishing all goals and expectations, the mind is allowed to settle into its natural clarity, and wisdom arises from this unforced alignment of body and consciousness. The emphasis on correct posture and breathing is not merely technical; it is the very way in which awakening is embodied.

Deshimaru also stressed that this “just sitting” is not confined to the meditation hall but extends into the fabric of daily life. When grounded in zazen, ordinary activities—work, family interactions, and social responsibilities—become the living field of Zen practice. Everyday mind, when informed by this non-seeking attitude, is itself the Way. From such continuous practice, compassion, freedom, and insight naturally unfold, not as achievements to be grasped, but as qualities that reveal themselves when nothing special is being pursued.