三角頭巾 (sankaku zukin, lit. triangular headpiece) is a type of headband sometimes worn by ghosts in Japanese folklore. Ex.: post #456723
Formerly, mistakenly tagged as hitaikakushi. (See forum #62509)
Derived from Edo period burial rituals, it was originally intended to protect the newly deceased from evil spirits. It has various regional names, Hitai-eboshi, Tenkan, Houkan, Kami-kaburi, and so on.
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