How to Say “Stay Hydrated” in Japanese

こまめに水分補給してください
komame ni suibun hokyū shite kudasai
The English phrase "stay hydrated" can be expressed in Japanese as こまめに水分補給してください (komame ni suibun hokyū shite kudasai).
The phrase is used as a reminder to drink water regularly to maintain a healthy fluid balance in the body. Adding こまめに (komame ni) emphasizes the importance of drinking water frequently rather than all at once.

What does it mean word for word?

The core concept is 水分補給 (suibun hokyū), which literally means "water/moisture replenishment."

Is there a formal and an informal way to say it?

The default form こまめに水分補給してください is a polite way to advise someone to stay hydrated, often seen in public health announcements or medical advice. More formal variations include 適度に水分を摂るようにしてください (Please make sure to consume an appropriate amount of fluids), 水分補給を忘れずに行ってください (Please remember to replenish fluids) and 熱中症にならないように水分をこまめに摂ってください (Please consume fluids frequently to prevent heatstroke). For a more informal tone, you can use 水分補給を忘れないでね (Don't forget to replenish fluids).

How do you pronounce it?

komame ni suibun hokyū shite kudasai

Did you know?

  • The kanji 補給 (hokyū) in 水分補給 is the same word used for 'resupply' or 'refuel' in a military or logistical context. This gives the act of drinking water a nuance of 'refueling' the body like a machine.
  • In Japanese schools, students often perform 水分補給 (suibun hokyū) during scheduled 'water breaks' orchestrated by teachers to prevent heatstroke during physical education.
  • While English speakers might suggest 'drinking water', Japanese health guidance often specifies 水分 (suibun) to include sports drinks containing electrolytes, which are seen as more effective for 'replenishment'.

Examples in context

  • 暑いので、こまめに水分補給してください。
    Atsui node, komame ni suibun hokyuu shite kudasai.
    It's hot, so please stay hydrated.
  • 運動中は、こまめに水分補給してくださいね。
    Undouchuu wa, komame ni suibun hokyuu shite kudasai ne.
    Please stay hydrated during your workout.
  • 風邪を引かないよう、こまめに水分補給してください。
    Kaze o hikanai you, komame ni suibun hokyuu shite kudasai.
    Please stay hydrated so you don't catch a cold.

Example conversation

A sunny park during a jogging session.

  1. 健太 Kenta

    今日はとても暑いですね。
    Kyou wa totemo atsui desu ne.
    It's very hot today, isn't it?
  2. 結衣 Yui

    はい、少し疲れました。
    Hai, sukoshi tsukaremashita.
    Yes, I'm a little tired.
  3. 健太 Kenta

    無理をしないで、こまめに水分補給してください。
    Muri o shinai de, komame ni suibun hokyuu shite kudasai.
    Don't push yourself, and please stay hydrated.
  4. 結衣 Yui

    ありがとうございます、そうします。
    Arigatou gozaimasu, sou shimasu.
    Thank you, I will.
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Henry Carson
Henry CarsonHelp make this guide better. Spot a mistake, know another way to say it, or have an example from real life? Share it below.
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