How to say "irrigation" in Japanese

• 灌漑かんがいCommon
  noun, suru verb, transitive verbThe straightforward word for irrigation in the agricultural sense—supplying water to crops and farmland. This is what you want for irrigation in farming contexts.
• 利水りすいCommon
  no-adjectiveRefers to putting water to practical use, such as for agriculture, industry, or daily life. It can include irrigation but is broader, so it is not specifically the word for watering fields.
• 水利すいりCommon
  nounCovers utilization of water and water supply in general, with irrigation as one of its senses. It is a broad, somewhat formal term for water use rather than a precise word for agricultural irrigation.

Use 灌漑 for the agricultural sense of supplying water to fields; 利水 and 水利 are broader terms about using or managing water resources, and only partly cover irrigation.

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

• 灌漑かんがいirrigation
• 利水りすいirrigation
• 水利すいりutilization of water
• 灌注かんちゅうirrigation
• 洗滌せんできwashing