It is also called 'Shuji Mandala' (Seed-Syllable Mandala) as a character that represents Buddha, and is called shuji in Buddhism (Esoteric Buddhism).
仏を表わす文字を仏教では種子(密教)（しゅじ、あるいは「種字」とも）と言うことから、「種子曼荼羅」とも言う。