How to say "sewer" in Japanese

• 下水道げすいどうCommon
  nounCovers 'sewer' in the infrastructure sense: the system of pipes and drains that carries away wastewater, as in municipal sewerage. This is the common word for that meaning.
  そして汚水おすいを流ながすために地下ちかに下水道げすいどうを持もっていた。↗

  The house has pipes under the ground to carry dirty water away.
• 溝渠こうきょ
  nounCovers the drainage-channel side of 'sewer', alongside its other senses 'ditch' and 'canal'. A less common word, so for the sewer system itself 下水道 is the usual choice.
• 縫い方ぬいかた
  nounDespite the gloss 'sewer', this word really means the method or way of sewing, as in how a garment is stitched; it is seldom the word you want for a person who sews.

Use 下水道 for 'sewer' meaning the wastewater system; 溝渠 is a less common word that leans toward 'ditch' or drainage channel; 「縫い方」, despite its gloss, really means 'sewing method', not a person who sews.

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

• 下水道げすいどうsewer
• 溝渠こうきょditch
• 縫い方ぬいかたsewing method