daimoku 

In Nichiren Buddhism in Japan this is the name given to the Lotus Sūtra, which the school holds to be the highest revelation of Buddhist teaching. Followers believe that chanting the title of the scripture effects liberation and instils wisdom. In Japanese, the chant is Namo myōhō renge kyō, which means ‘Hail to the Scripture of the Lotus of the Marvellous Dharma!’

A Dictionary of Buddhism, Oxford University Press, 2003, 2004 (which is available in electronic version from answer.com)