Nishiki Bay (nisiki no ura) is thought to have been a poetic location in Shima Province. If so, it was located on the inland sea coast in modern Kisei-chō in the Watarai District of Mie Prefecture. Another possibility places it further south, in modern Nachikatsura-chō in the Higashi Muro district of Wakayama Prefecture.
It was ripe for plays-on-words as nisiki literally translates as ‘brocade’ and ura ‘bay’ is homophonous with ura ‘behind’. So Dōmyō is looking at the bay, but although beyond its beautiful surface.