How to say "reinforcements" in Japanese

• 増派ぞうはCommon
  noun, suru verb, transitive verbCovers reinforcements as extra troops or personnel dispatched to strengthen a force already deployed. Typical of military or police contexts, where additional units are sent to bolster an ongoing operation.
• 加勢かせいCommon
  noun, suru verb, intransitive verbReinforcements as aid or backing given to someone already engaged in a fight, contest, or effort. The emphasis falls on lending support to a struggling side rather than on the dispatched force itself.

Choose 増派 for extra troops or personnel dispatched to strengthen an existing deployment, and 加勢 for aid or backing that supports a side already engaged in a fight or contest.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 増派ぞうはreinforcements
• 加勢かせいassistance
• 後詰めごづめreinforcements
• 援兵えんぺいreinforcements
• 救援軍きゅうえんぐんreinforcements
• 助勢じょせいencouragement