The stick, called a kyosaku, is used to awaken drowsiness and intensify focus during meditation, not as punishment.
The implement in question is called a kyosaku or keisaku in Japanese Zen. It is a flat wooden stick, typically about two feet long, used by monitors during zazen (sitting meditation). The teacher or senior student strikes practitioners on the shoulders or back, usually lightly to moderately, when noticing signs of drowsiness, restlessness, or what is seen as a slouching posture that impedes meditation.
This is not a punishment or test of endurance. Rather, it is offered as a tool of instruction, comparable to a physical reminder or adjustment in yoga. The practitioner can request the strike by bowing or by taking a particular posture, indicating they welcome the intervention to sharpen their practice.
The kyosaku appears in East Asian Zen (Chan in Chinese) meditation halls by at least the medieval period, though its exact origins are debated among scholars. Its purpose is rooted in practical observation: during long meditation retreats (sesshin), practitioners often become drowsy or lose mental clarity. The strike is intended to jolt the nervous system, reset attention, and help the meditator return to sharp, alert awareness.
Zen teachers often describe the strike as compassionate intervention. The logic is that if a student is struggling with drowsiness or scattered mind, a well-timed strike can be more effective than verbal instruction. The sensation is meant to cut through conceptual thinking and return the meditator directly to present experience—a central aim of Zen practice.
Not all Zen centers use the kyosaku. Some contemporary teachers and lineages have abandoned the practice due to concerns about consent, trauma sensitivity, and questions about whether it remains necessary for modern practitioners. Other centers, particularly those in traditional Soto Zen lineages (descended from Dogen) and some Rinzai lineages, continue the practice.
Where the kyosaku is used, protocols typically exist: practitioners may refuse by maintaining a neutral posture, or they may explicitly request it. Some centers ask students to sign consent forms. The strike itself is performed with control—it is designed to be sharp and attention-grabbing rather than painful.
From a neurological standpoint, a strike activates the sensory nervous system suddenly, interrupting the state of mental dullness. This creates a moment of heightened alertness sometimes called "bright awareness" in Zen terminology. The surprise element can also interrupt the discursive thinking that often clouds meditation.
However, the effectiveness of this method depends heavily on context and individual psychology. For some practitioners, it becomes a valued part of intensive practice. For others, it may create tension, fear, or distraction. Modern neuroscience has not definitively proven that striking produces deeper meditation states than other methods of maintaining alertness, such as adjusting posture, walking meditation, or teacher guidance.
Contemporary Zen teachers have begun critically examining the kyosaku practice, particularly in Western contexts where cultural expectations around physical contact differ from traditional Japanese dojo norms. Some teachers view it as an anachronism—useful in a specific historical context but not essential to authentic Zen practice. Others argue that mindful, consensual use of the kyosaku remains a valid pedagogical tool that students should encounter if they seek it.
What remains consistent across these discussions is that the kyosaku, when used, is not meant as punishment or violence. It is framed as an offer of help, rooted in compassion and directed toward clarity. Whether it remains an effective tool for contemporary practice remains an open question within Zen communities.