What is Shikantaza (Just Sitting)?

Only indirectly. Direct scientific study of shikantaza is essentially absent, so its proposed effects are borrowed from wider meditation science: reviews of mindfulness link open practices to decentering and less rumination (Britton et al., 2021), mind-wandering research treats meta-awareness, noticing when attention has drifted, as a distinct skill (Christoff et al., 2009), and brain-imaging models tie meditation to shifts in self-referential networks such as the default mode network (Cooper et al., 2022). Read these as plausible, theory-supported accounts of how just sitting may work, not confirmed effects for this practice (Laukkonen & Slagter, 2021).

Possibly, for a busy, self-focused mind, though this is a plausible inference rather than a proven effect. Broader meditation and mindfulness research links open, objectless practices to decentering, the shift from being caught inside a thought to observing it, and to reduced rumination, and meditation theory describes such practices as loosening habitual, anticipatory thinking (Britton et al., 2021), (Laukkonen & Slagter, 2021). Shikantaza itself has not been studied in any trial, so it cannot be called a treatment for anxiety (Cooper et al., 2022), (Austin, 2009). When anxiety is prominent or acute, sitting with no anchor can make looping thoughts louder, so a more anchored practice or professional support may suit better.

Removing the usual focus point is thought to let attention broaden into a panoramic, open awareness, and meditation theory frames this open monitoring as loosening habitual, self-focused thinking (Laukkonen & Slagter, 2021). With nothing to chase, thoughts can be observed as they come and go, a decentering shift that mindfulness reviews associate with less automatic reactivity and rumination (Britton et al., 2021), alongside reduced activity in the self-referential default mode network (Cooper et al., 2022) and a strengthening of meta-awareness, the skill of noticing when the mind has wandered (Christoff et al., 2009). These accounts are drawn from meditation broadly, so read the resulting calm as plausible settling and perspective rather than a proven, measured effect for just sitting.

Honestly, shikantaza specifically has not been imaged, so brain effects are inferred from broader meditation and healthy-adult neuroscience rather than measured for just sitting. Models of meditation link practice to quieting the default mode network, the connected regions most active during self-focused thought and mind-wandering, so inner self-talk may soften (Cooper et al., 2022). That inward system normally trades off with outward-facing attention networks, and just sitting is proposed to tip the balance toward open, alert presence (Fox et al., 2005). Treat these as plausible directions, not confirmed findings for this practice (Laukkonen & Slagter, 2021).

Use care. This is a practice-informed, mechanism-inferred caution rather than measured harm, because no trials or adverse-event studies of just sitting in trauma or intrusive-thought populations exist, and its likelihood and severity for any one person are unknown (Britton et al., 2021), (Austin, 2009). Because shikantaza removes the usual anchor of a breath or mantra, that openness can let distressing material surface more strongly instead of settle; resting attention lightly on the breath, shortening sessions, or pausing gives you somewhere to return. Shikantaza is not a treatment for any mental health condition and should complement, not replace, professional support.

Ground and shorten. Because shikantaza removes the usual anchor of a breath or mantra, that openness can let restlessness or anxious thoughts surface more strongly for some people rather than settle; a practical response is to bring in a light anchor such as the breath or the sensation of sitting, shorten the session, or stop for now. This caution comes from teaching experience and from how objectless attention works, not from studies that measured harm, so its likelihood for any one person is unknown. If distress keeps returning, work with an experienced teacher or a mental health professional and treat just sitting as a complement to care, not a replacement for it.

Start with about five to ten minutes and extend only as the practice feels steady. Because shikantaza removes the usual anchor of a breath or mantra, giving open attention time to become familiar rather than overwhelming matters more than hitting a target duration; a stable upright posture, a chair if your back, hips, or knees complain, and a light anchor to return to if openness feels destabilising all help. Treat these as practice-informed suggestions from teaching experience, not a measured dose, and don't tie any specific length to a particular benefit.

The core distinction is structural, not a matter of which is more effective. Focused-attention practice keeps attention on one anchor, such as the breath or a mantra, and returns to it each time the mind wanders, while shikantaza, or "just sitting," is a Soto Zen practice of alert, objectless sitting with no anchor, technique, or goal (Austin, 2009). Meditation theory frames these open, objectless practices as gradually loosening habitual, self-focused thought rather than concentrating it on a single point, an account that is suggestive but not yet confirmed for shikantaza specifically (Laukkonen & Slagter, 2021). No direct comparative trials have tested one against the other, so choose by fit: an anchor tends to steady restless or newer minds, while anchorless sitting suits those comfortable resting in open awareness.