How to say "utilization" in Japanese

• 利用りようJLPT N4approx.Common
  noun, suru verb, transitive verbThe general term for putting something to use — resources, time, opportunities, facilities. Choose this when 'utilization' simply means making use of something, with no special nuance attached.
  休暇きゅうかをできるだけ上手うまく利用りようしなさい。↗

  Make the most of your vacation.
• 使用しようJLPT N3approx.Common
  noun, suru verb, transitive verbAlso 'use', but with the emphasis on the act of using or operating something — a tool, machine, or facility. It fits 'utilization' when the focus is on the employment of equipment itself.
  使用しようする前まえに瓶びんを振ふってください。↗

  Shake the bottle before using.
• 流用りゅうようCommon
  noun, suru verb, transitive verbCovers 'utilization' only in the sense of putting something to a different purpose than intended — diverting funds, materials, or ideas for reuse elsewhere. For ordinary use, this is not the word you want.

Choose 利用 for making use of something in general, 使用 when the emphasis is on the act of using or operating it, and 流用 only when something is diverted or repurposed for a different use.

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

• 利用りようuse
• 使用しようuse
• 利用法りようほうusage
• 流用りゅうようmaking use of (for another purpose)