How to say "binder" in Japanese
Choosing the right word
- nounThe loanword for the familiar office item: a ring folder holding loose-leaf papers. When English 'binder' means this stationery object, this is the word to reach for.
- 粘結剤ねんけつざいnounA technical term for a binding agent — a substance that holds the particles or components of a material together. It belongs to industrial and chemical vocabulary, not to the office sense.
- 結合剤けつごうざいnounAlso a technical term for a binding agent, a substance that binds the parts of a material together. It sits close to 粘結剤 in meaning, and like it is not the office item.
For the office ring binder use 「バインダー」; 粘結剤 and 結合剤 are technical terms for a binding agent — a substance that holds materials together — and overlap heavily, so the field you are writing about decides between them.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only
Japanese equivalents
