Horagai are large conch shells, ordinarily using shells of Charonia tritonis, that are used as trumpets in Japan. The instrument has been used for several purposes throughout Japanese history, and consequently been given a number of Japanese names depending on its function. Special schools still teach students to play the traditional music associated with the conch. The conch shell is a spiritual symbol that has been used in many cultures throughout history including Buddhism. Together with the circle and the spiral, it is perhaps one of the oldest symbols used for esoteric wisdom. The ancients associated the conch shell with spiritual awakening in symbolism. Used as a horn in ancient times, it is typically associated with the sound used to wake people up, in a religious sense to awaken the senses and enlightenment.