also: とうしょ
noun
headnote; heading; superscription
A note or title written at the top of a document, list, or legal instrument. Often used in formal or official contexts.
契約書の頭書には、当事者の氏名が記載されている。
The names of the parties are written in the headnote of the contract.
この書類の頭書をよく読
Please read the heading of this document carefully.
noun which may take the genitive case particle 'no'
above-mentioned; aforementioned
Used attributively (with の) to refer to something written earlier in the same document. Common in legal and bureaucratic writing.
頭書の通り、本契約は来月から有効となります。
As stated above, this contract will take effect from next month.
頭書の条件に従って手続きを進めてください。
Please proceed according to the aforementioned conditions.
Variant with okurigana; slightly more explicit but less common than 頭書.
Compound of 頭 (かしら, 'head; top') and 書 (かき, 'writing'), literally 'writing at the top'. The reading とうしょ is the on-reading of the same kanji, used in more formal or Sino-Japanese contexts.