How to Say “Light” in Japanese Kanji

光
hikarikanji, noun
In kanji, "light" as brightness is 光 (hikari). A lamp or light you switch on is 明かり (akari), and "light" as in not heavy is 軽い (karui).
Meaning: light, brightness (noun)

Ways to say it

“light” in Japanese
Japanese Romanization Note
光 hikari kanji, noun
明かり akari kanji, lamp light
軽い karui kanji, not heavy

To say "turn on the light", people say 電気をつける (denki o tsukeru), literally "attach electricity". The word 電気 (denki) is used for room lights in everyday talk.

Which one should you use?

English "light" covers three ideas and Japanese uses separate words. 光 (hikari) is the shine of the sun or a beam. 明かり (akari) is the light in a room. 軽い (karui) describes weight, as in a light bag.

Did you know?

  • The kanji 光 (hikari) is also used in the name of the Hikari bullet train, whose name means "light".

Examples in context

  • 窓から光が入ります。
    Mado kara hikari ga hairimasu.
    Light comes in from the window.
  • 部屋の明かりを消して。
    Heya no akari o keshite.
    Turn off the light in the room.
  • このかばんは軽いです。
    Kono kaban wa karui desu.
    This bag is light.

Example conversation

Rina and her brother Daiki are in a dark room at night.

  1. Rina

    明かりをつけて。
    Akari o tsukete.
    Turn on the light.
  2. Daiki

    ちょっと待って。
    Chotto matte.
    Wait a moment.
  3. Rina

    光が見えたよ。
    Hikari ga mieta yo.
    I saw a light.
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Cory Barry
Cory BarryHelp 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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