The Himuro Mansion (氷室邸, Himuro-tei) legend describes a large traditional estate in the Tokyo metropolitan area — variously placed in Chōfu, Nishitōkyō, Kichijōji, or the western Fuchū district — where, according to the story, a ritual-sealing gone wrong in the late Edo or early Meiji period released vengeful spirits that have infested the grounds ever since. The legend rose to international prominence as the inspiration for Tecmo's 2001 survival-horror video game 'Fatal Frame' (零 Zero), whose developers researched the background at the still-extant sites before closing the game's lore around a composite of several real estates.
According to the most-repeated version, the Himuro family had performed for centuries a 'Strangling Ritual' (Kubitsuri no Gishiki) in which a young maiden — kept in purification for a decade — was ritually strangled with ropes attached to oxen pulled in opposing directions on the ground above a sealed well, her death preventing the 'Hell's Gate' from opening beneath the estate. On the last ritual attempt, said to have occurred in 1837 or 1867 depending on the source, the maiden ran to a lover the night before the ceremony; the ritual was performed on an impure subject and the sealing failed. The entire Himuro family was found dead the following morning, tied to trees with ritual ropes. The mansion was subsequently purchased and demolished in multiple 20th-century waves.
Multiple modern properties are candidates. A particular Nishitōkyō estate with a walled-off well is widely regarded by Tokyo paranormal researchers as the most likely original; Chōfu's older residential districts contain several estates whose construction records reference 'Himuro-family' owners. Trespassing reports associated with the legend are common enough that Tokyo Metropolitan Police have, in multiple statements since 2015, asked enthusiasts not to search for the mansion and have fined more than thirty trespassers. Whether the Himuro estate exists in any single identifiable form or represents a composite of several traumatic Edo-period sites, the legend remains central to Japanese modern ghost-culture and is one of the few Japanese urban legends with significant international reach.