上水|じょうすいjousui[0]heiban (flat)

1. nounwater supply; tap water

• Synonym飲料水いんりょうすいWrittenWritten term for water fit to drink, often seen in disaster-stockpile advice and on labels; denotes the water itself, not the supply system.
• Synonym飲用水いんようすいWrittenWritten/formal term for water that meets drinking-quality standards; 「上水」 is the water conveyed for drinking and can also mean the supply channel itself.
• Related飲み水のみみずNeutralColloquial and the plainest word for water to drink, as in 「飲み水を確保する」; unlike 「上水」, never refers to supply facilities or channels.
• Antonym下水げすいNeutralRefers to drainage and sewage, the wastewater side, as in 「下水道」; the counterpart of the supply that 「上水」 provides.
• Antonym汚水おすいWrittenWritten term for dirty, foul water; stands in contrast to the clean, drinkable water that 「上水」 denotes.

For water people drink, say 「飲み水」 in everyday speech or 「飲料水」 in writing. 「上水」 is the water supplied for drinking and the system or channels that carry it, as in 「上水道」「玉川上水」. For drainage and wastewater, use 「下水」.

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

1. 人ひとが飲のむことのできる状態じょうたいで送おくられる水みず。
2. 飲用いんようなどに用もちいるきれいな水みずの流ながれる水路すいろ。玉川たまがわ上水じょうすいなど。
3. 飲料いんりょう、工業こうぎょうその他たの目的もくてきに使つかうための水みずをパイプなどを用もちいて導みちびく設備せつび。上水じょうすい道どう。