What is "mikoshi-nyudo"

Mikoshi-nyūdō (見越し入道 or 見越入道) is a type of bald-headed yōkai "goblin" with an ever-extending neck. In Japanese folklore and Edo period (1603-1868) kaidan "ghost story" texts, mikoshi-nyūdō will frighten people who look over the top of things such as byōbu folding screens. The name combines mikoshi 見越し (lit. "see over") "looking over the top (of a fence); anticipation; expectation" and nyūdō 入道 (lit. "enter the Way") "a (Buddhist) priest; a bonze; a tonsured monster".