Lion Sound King ［師子音王仏］ ( Simhanādarāja; Shishionnō-butsu): A Buddha who is said to have appeared immeasurable kalpas ago. He is mentioned in the Non-Substantiality of All Phenomena Sutra and The Treatise on the Great Perfection of Wisdom. These works describe his land, in which all trees issue the Dharma sound that leads people to attain the way. After the death of Lion Sound King, however, the sound stops. In the latter age of this Buddha’s teaching, the monk Root of Joy carries out only the practice of expounding the doctrine of the true aspect of all phenomena. In spite of being slandered by the monk Superior Intent for that, Root of Joy persists in his beliefs and attains Buddhahood.