Traditionally, seiza is one of the Japanese formal ways of sitting. It is often used in martial arts and is performed with mindfulness in both martial arts and other formal Japanese settings. In yoga, seiza is called thunderbolt pose in English, or vajrasana in Sanskrit. The pose is often used as a resting posture for a meditative practice; although, when performed with the toes flexed and tucked under the feet, it offers a significant stretch to the feet and legs.
Seiza encourages tranquility by clearing the mind and entering into a state of rest, which is why it is often used as a meditative pose or for pranayama and/or sadhana practice. A seiza bench can assist yogis in entering into a state of rest and meditation for longer periods of time by minimizing discomfort. Outside of a yoga spiritual practice, this asana is also used by other religions as a prayerful pose.