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The Japanese scholar Shu Hikosaka on the basis of his study of Buddhist scriptures, ancient Tamil literary sources, as well as field survey, proposes the hypothesis that, the ancient mount Potalaka, the residence of Avalokiteśvara described in the Gandavyuha Sutra and Xuanzang’s Records, is the real mountain Potikai or Potiyil situated at Ambasamudram in Tirunelveli district, Tamil Nadu.