noun
Yomotsu Hirasaka; slope to the underworld
In Japanese mythology, the slope that separates the land of the living from Yomi, the land of the dead. Appears in the Kojiki and Nihon Shoki.
黄泉比良坂は、古事記に登場する黄泉の国への入り口である。
Yomotsu Hirasaka is the entrance to the land of the dead that appears in the Kojiki.
黄泉 is the underworld itself, while 黄泉比良坂 is the specific slope or boundary leading to it.
From 黄泉 (yomo, 'underworld') + つ (archaic possessive particle) + 比良坂 (hirasaka, 'gentle slope'). The exact origin of 比良坂 is uncertain, but it is a proper name from ancient mythology.