Hoto Nyorai: The tathagata is depicted in the east (the top of the Taizokai Mandala; in the Kongokai Mandala, the west is the top) as a symbol of 'hosshin' (which means making up one's mind to seek spiritual enlightenment).
宝幢如来東方（胎蔵界曼荼羅画面では上方　金剛界では西方が上方）に位置し「発心」（悟りを開こうとする心を起こすこと）を表わす