Synonym; 上頸 is the more common term for the same part of traditional clothing.
Standard kanji spelling for this term.
Variant using the more common 首 kanji.
Rare variant; 紙 is likely ateji.
Rare variant; 紙 is likely ateji.
Compound of 頸 (kubi, 'neck') and 上 (kami, 'upper part'). The kanji 紙 in some variants is likely ateji.