noun
self-annotation; author's own notes
Refers to annotations or commentary added by the author to their own work, such as footnotes or marginal notes.
彼の本には自注がたくさん付いている。
His book has many self-annotations.
自注を読むと、作者の意図がよくわかる。
Reading the author's own notes helps understand the writer's intentions.
Compound of 自 (self) and 注 (annotation). The variant 自註 uses the older form 註 for 'annotation'.