noun
first author
Used in academic publishing to refer to the author listed first on a paper, often the primary contributor.
この論文の筆頭著者は田中先生です。
The first author of this paper is Professor Tanaka.
筆頭著者として研究をまとめる責任がある。
As the first author, I have the responsibility to compile the research.
Compound of 筆頭 (ひっとう, 'head of a list') and 著者 (ちょしゃ, 'author'). The term is a modern academic coinage.