Shikantaza, or "just sitting" meditation, is a core practice in Soto Zen Buddhism. Unlike other forms of meditation that may involve specific techniques or mantras, shikantaza is a form of mindfulness meditation that emphasizes simply being present and aware in the present moment.

In shikantaza meditation, the practitioner sits in a stable and comfortable posture, typically cross-legged on a cushion or bench. The eyes are kept open with a soft gaze, and the hands are placed in a mudra, or hand position, to help maintain focus and stability.

The main technique in shikantaza meditation is to simply observe the breath and any thoughts or sensations that arise without judgment or attachment. This can be challenging, as the mind naturally wants to wander and attach to thoughts, but the key is to gently bring the attention back to the present moment.

While there are no specific mantras used in shikantaza meditation, some teachers may suggest using a simple phrase or word to help anchor the mind, such as "just sitting" or "just breathing." This can serve as a reminder to return to the present moment and let go of any distractions or attachments.

Another technique that may be used in shikantaza meditation is counting the breaths. This involves silently counting each inhalation and exhalation up to a certain number, such as ten, and then starting over. This can help maintain focus and prevent the mind from wandering too far.

However, the main emphasis in shikantaza meditation is on simply being present and aware, rather than trying to achieve a certain state or experience. This can be a challenging but ultimately liberating practice, as it allows the practitioner to let go of attachments and expectations and simply be with whatever is arising in the present moment.

In conclusion, shikantaza meditation does not involve any specific techniques or mantras, but rather emphasizes the practice of being present and aware in the present moment. By cultivating this awareness, practitioners can experience a sense of peace and clarity that extends beyond the meditation cushion into their daily lives.