Ano Zumi is a colloquial term for Nozura zumi that came into use in the early Showa era, meaning the stone walls that were laid by the Ano-shu Guild using mostly unprocessed natural stones.
穴太積みとは、野面積みを示す昭和初期に言われるようになった俗称であり、穴太衆が積んだ野面積みの石垣のこと。