Green Dragon Monastery, Qinglong Monastery .
It was in 805 that Kūkai finally met Master Huiguo 惠果 (Jap. Keika) (746-805) the man who would initiate him into the esoteric Buddhism tradition at Changan's Qinglong Monastery 青龍寺. Huiguo came from an illustrious lineage of Buddhist masters, famed especially for translating Sanskrit texts into Chinese, including the Mahavairocana Sutra.