絞り込む

1. Origins, structure, and basic meaning

• Structure: 絞り込む (しぼりこむ) is a transitive verb for narrowing candidates by criteria. The examples use connective and past forms.
• Basic usage: Matching candidates are reduced to three before comparison; an investigation narrows the cause to one.

2. Common pitfalls and similar expressions

• Reducing options for comparison and identifying one cause
  • Targets are 候補を and 原因を; retained counts are 三つに and 一つに. The use is selection, not physical squeezing.