March 12

Ki in Japanese – Some Common Uses of 気


Ki in Japanese – One Word, Many Uses

Using the word ki in Japanese is a daily occurrence. From greetings to how you feel about things, the word ki is versatile and used quite liberally.

In this, one of the unique phrases we cover involves the kanji 気 and 置けない together to mean something a bit unexpected. We look at a few phrases that use 気 in particular, and hopefully you come away with something useful.

A special shout out to Kumiko Sensei who wrote the explanations for us – she breaks it down step by step, and keeps it short and simple. The English is not a word-for-word translation of the Japanese, but basically carries the same meaning, so use it to follow along. If you find this content useful, check out the next article where we cover kikoeru vs. kikeru!

 What does ki in Japanese mean? 

Probably the most common use of ki in Japanese is in the word genki 元気. It can be used as part of a greeting to ask "how are you doing?", ogenki desuka? お元気ですか。

The word ki itself really refers to your "spirit" in the "air inside of you" or "energy" sense. No wonder it sounds so similar to the Chinese word qi (pronounced: chi) that refers to the same thing.

Almost any use of the word ki in Japanese is referring to air, energy, or a "feeling" in some way, so that should help give you some context when you encounter it in the wild.

Let's open with an example paragraph.

What is a "Ki no okenai tomodachi" (気の置けない友達)

Japanese Ema 絵馬

Note** To begin reading, download Rikaichamp (Firefox) or Rikaikun (Chrome) so when you mouse over kanji you get the reading and general meaning!



The word 気 carries the meaning of something’s “quality” or “feeling.”

Let’s look at the phrase 気が抜ける. It means something like when you finish a test and you’re just done with that subject. You have no desire to keep studying it, and you don’t want to do anything on that subject anymore. Another way of using the same phrase is regarding a physical thing, like cola. 気が抜けたコーラ has lost its flavor and carbonation. Definitely not a delicious cola!


The phrase 気が利く refers to (someone) who pays attention to really fine details. For instance, “you’re young, but you really pay attention, don’t you.” The phrase can also be used when talking about things like a store or a hat that has a great level of detail, so don’t be afraid to use it in situations where you want to convey a positive meaning.


So what type of person is a 気の置けない友人? This is actually a phrase that lots of Japanese people use incorrectly, so it’s a tricky one to use. 気の置ける means to hesitate, so when you change that to the negative 置けない, it means kind of like “without hesitation.” Basically, a 気の置けない友人 is a friend you are really close with; there’s no hesitation between the two of you.

Some other simple ways to use ki in Japanese

Some other common uses of the word ki include:

kuuki 空気 – Air

haiki 排気 – Exhaust

genki 元気 – Doing well, healthy

ki ga suru 気がする – To have a feeling (about something)

ki ni shinai 気にしない – To not care

ki wo tsukete 気をつけて – To take care (be careful)

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