1.
newly written work; original composition
a literary work, song, screenplay, etc. that is written specifically for a particular purpose or publication, rather than being a reprint or adaptation
この小説は書き下ろしだ。
This novel is newly written (for this publication).
映画のための書き下ろし楽曲を発表した。
They released a song written specifically for the movie.
人気作家の書き下ろしエッセイが収録されている。
The book contains a newly written essay by a popular author.
PUBLISHING/CREATIVE TERM:
書き下ろし emphasizes that a work was created fresh, specifically for the occasion, rather than being recycled or adapted from existing material.
COMMON COLLOCATIONS:
- 書き下ろし小説 - newly written novel
- 書き下ろし楽曲 - newly composed song
- 書き下ろしエッセイ - newly written essay
- 書き下ろし脚本 - original screenplay
CONTRAST:
- 書き下ろし - written new for this occasion
- 再録 - reprint
- 改稿 - revised version
NOTE:
In music, a 書き下ろし song means one composed specifically for that project (film, anime, drama), not a pre-existing track.