Japa Yoga is the yoga of mindful recitation. It can also be described as repetitive prayer.
In Japa Yoga, certain mantras (such as Om) or a name of God are repeated in accordance with specific rules. The mantras or name of God can be repeated internally, in a whisper, or verbally. Of these three methods, internal recitation is considered the most effective, followed by recitation through whisper. Japa Yoga can be practiced in a meditative pose or even while performing other activities.
See also: “Mantra” and “Om / Aum / Om Meditation”