Acala Vidyārāja - Fudō Myōō (不動明王)

The latest addition to Visible Mantra is a page for Fudō. Fudō is a wrathful manifestation of Mahāvairocana who acts as a messenger and protector. He is one of a group of Vidyārājas. Vidyā is sometimes used as a synonym for "mantra" in Tantric Buddhism, though it's basic meaning is knowledge (the word is related to the Sanskrit Veda), and it is often used to connote magical or esoteric knowledge. A Vidyārāja then, is king of esoteric knowledge especially of mantra. Fudō is one of the thirteen principal deities of the modern Shingon School.

I have to admit I'm not very familiar with this character as he does not figure in the Western Buddhist Order to any great extent. I'm drawing entirely on Shingon sources for this mantra, but especially the Shingon "Handbook for Followers" by Abbot Yusei Arai.