Shikantaza, or "just sitting" meditation, is a central practice in Soto Zen Buddhism. It is a form of meditation that emphasizes being present in the moment and letting go of any distractions or thoughts that arise.

In Zen Buddhism, the ultimate goal is to achieve enlightenment or awakening, which is the realization of one's true nature and the interconnectedness of all things. Shikantaza meditation is a means to this end, as it allows practitioners to quiet the mind and experience this interconnectedness.

One of the key principles of Zen Buddhism is the concept of non-duality, or the idea that there is no separation between the self and the world. Shikantaza meditation helps to dissolve the illusion of separation and allows practitioners to experience this non-dual nature.

In shikantaza meditation, there is no specific focus or object of meditation. Instead, practitioners are encouraged to simply sit and be present with whatever arises in the moment. This can include physical sensations, thoughts, emotions, or external sounds. By not fixating on any one thing, practitioners can cultivate a sense of spaciousness and openness in the mind.

Another important aspect of shikantaza meditation is the practice of non-attachment. In Zen Buddhism, attachment is seen as the root of suffering. By letting go of any attachments or expectations, practitioners can cultivate a sense of non-grasping and acceptance in their meditation practice.

Shikantaza meditation also encourages a non-judgmental attitude towards one's thoughts and experiences. Instead of trying to control or suppress thoughts, practitioners are encouraged to observe them with a sense of curiosity and detachment. This helps to cultivate a sense of equanimity and non-reactivity in the mind.

Overall, shikantaza meditation is a powerful tool for cultivating mindfulness, non-duality, non-attachment, and non-judgment in Zen Buddhism. By practicing this form of meditation, practitioners can deepen their understanding of the true nature of reality and ultimately achieve enlightenment.