JLPT N4 - Grammar ๐ ใใจ koto
Have you ever wanted to take an action word, a verb, and turn it into a thing so you can talk about it?
In English, we do this all the time with -ing. This process is called a verb nominalizer, it changes a verb into a noun-like form.
Think about it like…
cook → cooking → “My hobby is cooking.”
study → studying → “Studying Japanese is fun.”
meet → meeting → “I remember meeting her.”
In each case, an action (cook, study, meet) becomes a noun-like idea that you can talk about.
In Japanese, that’s exactly what ใใจ (koto) does!
Once you master this, your vocabulary will grow a lot, and communication will become much more fun.
Shall we check it out?




ใฎ (no) : casual nominalizer
Like ใใจ, ใฎ can also turn verbs into nouns, but it’s softer and more casual.
You’ll often hear it in spoken Japanese.
ๆฅๆฌ่ชใ ๅๅผทใใใฎใฏ ๆฅฝใใใ
ใซใปใใ ใ ในใใใใ ใใ ใฎ ใฏ ใใฎใใใ
nihongo wo benkyou suru no ha tanoshii.
Studying Japanese is fun. (casual)
ๆฅๆฌ่ชใ ๅๅผทใใใใจใฏ ๆฅฝใใใ
ใซใปใใ ใ ในใใใใ ใใ ใใจ ใฏ ใใฎใใใ
nihongo wo benkyou suru koto ha tanoshii.
Studying Japanese is fun. (more formal / written)
๐ก Tip:
ใใจ → more formal, often used in writing, rules, and polite speech.
ใฎ → more casual, common in conversation.
็งใฎ่ถฃๅณใฏ ๅ็ใ ใจใใใจใงใใ
ใใใ ใฎ ใใ
ใฟ ใฏ ใใใใ ใ ใจใ ใใจ ใงใใ
watashi no shumi ha shashin wo toru koto desu.
My hobby is taking photos.
ๅปๅนดใใใชใใซไผใฃใใใจใ ่ฆใใฆใใพใใ
ใใใญใใใใชใ ใซ ใใฃใ ใใจ ใ ใใผใใฆ ใใพใใ
kyonen, anata ni atta koto wo oboete imasu.
I remember meeting you last year.
ไปใฎๅฝใซ ่กใฃใใใจใ ใใใพใใ๏ผ
ใปใ ใฎ ใใซ ใซ ใใฃใ ใใจ ใ ใใใพใ ใ๏ผ
hoka no kuni ni itta koto ga arimasu ka?
Have you ever been to another country?
ๅฐ้ใไฝ้จใใใใจใ ใใใพใใ๏ผ
ใใใ ใ ใใใใ ใใ ใใจ ใ ใใใพใ ใ๏ผ
jishin wo taiken shita koto ga arimasu ka?
Have you ever experienced an earthquake?
<Conversation example>
A: ๆฅๆฌ่ชใๅญฆใถใจใใซ ๅคงๅใชใใจใฏ ไฝใงใใใ
ใซใปใใ ใ ใพใชใถ ใจใ ใซ ใใใใค ใช ใใจ ใฏ ใชใ ใงใ ใใ
nihongo wo manabu toki ni taisetsu na koto ha nan desu ka?
What’s important when learning Japanese?
B: ๆฏๆฅๅฐใใใค็ทด็ฟใใใใจใงใใ
ใพใใซใก ใใใใใค ใใใใ
ใ ใใ ใใจ ใงใใ
mainichi sukoshizutsu renshuu suru koto desu.
It’s practicing little by little every day.

- Grammar Point: ใใจ(koto)
- JLPT Level: N4
- Meaning: Verb nominalizer, turns verbs into noun-like phrases
- Quick Explanation: ใใจ changes verbs into nouns so you can talk about actions as “things.”
So that’s how we use ใใจ in Japanese!
It’s one of the most versatile tools for expanding your expression. Once you master it, you’ll be able to talk about actions, experiences, and even memories in a natural way.
ๆฅๆฌใซๆฅใใใจใใใใพใใใ
ใซใปใใซ ใใ ใใจใ ใใใพใใใ
nihon ni kita koto ga arimasu ka?
Have you ever been to Japan?
Now it’s your turn! What’s an action or experience you want to describe using ใใจ? Try making your own sentence!
Your Sensei,
Hikari ๐ฉ๐ป๐ซ
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