How to Say “To Lock” in Japanese

鍵をかける
kagi o kakeru
To lock in Japanese is 鍵をかける (kagi o kakeru).
鍵をかける is used when you want to fasten a lock on a door, a drawer or a container to keep it secure. Note that this phrase is used for objects. You would not use this specific phrase to mean 'locking' a person inside a room.

What does it mean word for word?

The phrase literally means 'to hang/apply a key'. The noun 鍵 (kagi) means 'key' or 'lock'.

How does it change in a sentence?

To express the past tense, use 鍵をかけた (kagi o kaketa). When making a request or connecting sentences, use the te-form 鍵をかけて (kagi o kakete).

How do you pronounce it?

kagi o kakeru

Did you know?

  • The verb かける in 鍵をかける can also mean 'to make a phone call' or 'to cast a spell'. In Japanese, the same word is used for the action of applying or launching something across a distance.
  • Even when using a thumb-turn lock that requires no physical key to operate, Japanese speakers will still use the phrase 鍵をかける (kagi o kakeru).
  • You will often see the formal term 施錠する (sejō suru) on signs and manuals, which serves as a technical alternative to 鍵をかける.

Examples in context

  • ドアに鍵をかけるのを忘れないように。
    Remember to lock the door.
    This sentence is useful for practicing the phrase 鍵をかける in the context of a reminder.
    Tatoeba #201876 by bunbuku, translation #39088 by Swift
  • 出かけるときは、ドアに鍵をかけるのを忘れないように気をつけてください。
    Please be careful not to forget to lock the door when you go out.
    This sentence shows how to use 鍵をかける when giving a polite instruction regarding leaving the house.
    Tatoeba #234011 by KK_kaku_, translation #71384 by CK
  • 物置に鍵をかけるのを忘れちゃった。
    I forgot to lock the storeroom.
    This sentence demonstrates the use of 鍵をかける when expressing that a task was forgotten.
    Tatoeba #83740 by mookeee, translation #319976 by CK
  • 公共の場では、荷物を施錠してください。
    Please lock your belongings in public areas.
  • 会議室は退出する前に、鍵を掛けてください。
    Please lock the conference room before leaving.
  • スマートフォンをロックしておくと安全ですよ。
    It's safer to lock your smartphone, you know.

Example conversation

Two people are getting ready to leave the house.

  1. 陽葵 Himari

    玄関の鍵をかける?
    genkan no kagi o kakeru?
    Are you locking the front door?
  2. 大翔 Hiroto

    うん、今鍵をかけるよ。
    un, ima kagi o kakeru yo.
    Yeah, I'm locking it now.
  3. 陽葵 Himari

    ちゃんと鍵をかけた?
    chanto kagi o kaketa?
    Did you lock it properly?
  4. 大翔 Hiroto

    大丈夫、しっかり鍵をかけたよ。
    daijoubu, shikkari kagi o kaketa yo.
    It's fine, I locked it securely.

Sources

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Marian Taylor
Marian TaylorHelp 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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