noun
author's preface
A preface written by the author themselves, as opposed to a foreword by someone else. Common in literary and academic contexts.
この本の自序には、執筆の動機が詳しく書かれている。
In the author's preface of this book, the motivation for writing is described in detail.
Compound of 自 (self) and 序 (preface, order). The exact historical derivation is uncertain, but the spelling is conventionally associated with the meaning 'author's own preface'.