分冊

1. Origins, structure, and basic meaning

• Structure: 分冊, read ぶんさつ, means dividing the contents of a book into several volumes or the volumes produced that way.
• Basic usage: It is used when publishing a thick reference work in separate volumes or carrying only the needed volume of a dictionary.
  • 分厚い資料集を三巻に分冊して刊行した。

2. Common pitfalls and similar expressions

• The distinction from 別冊
  • 分冊 focuses on dividing one work into multiple volumes, while 別冊 refers to a booklet or volume separate from the main one.