Meaning
の works like “of” or the apostrophe-s in English. Owner の thing: 私の本 is “my book”. It can also describe type or origin (日本語の本) and replace the second noun when it is clear (私の is “mine”).
Formation
How to build this grammar pattern, with an example for each case.
| Use | Structure | Example | Meaning |
|---|---|---|---|
| Possession | A の B | 私の本 | my book |
| Description | A の B | 日本語の先生 | a Japanese teacher |
| Belonging | Place の B | 学校の先生 | a teacher of the school |
| Replaces a noun | A の | この本は私のです。 | This book is mine. |
Usage notes
Owner first
The owner or modifier comes before の, and the thing it describes comes after.
Replacing a noun
When the second noun is clear, it can be dropped: 私の means mine.
Not for adjectives
い-adjectives go directly before a noun: 大きい本.
Example sentences
これは私の本です。
This is my book.
田中さんの車は赤いです。
Mr. Tanaka’s car is red.
日本語の本です。
It is a Japanese book.
東京の天気はどうですか。
How is the weather in Tokyo?
そのかばんは誰のですか。
Whose bag is that?
Common mistakes
✗ Incorrect私の大きいの本
✓ Correct私の大きい本
Adjectives go straight before the noun without の.
✗ Incorrect本の私
✓ Correct私の本
The owner comes first: owner の thing.
Similar grammar
は
Topic marker
私は学生です。 I am a student.と
Joins nouns as “and”
本とペン a book and a penや
Lists examples
本やペン books, pens and so onQuick quiz
1. これは私（ ）本です。
2. 日本語（ ）先生
3. Which means Mr. Tanaka’s car?
4. この本は私（ ）です。 (mine)
5. 東京（ ）天気
6. Which is correct?
7. そのかばんは誰（ ）ですか。
8. In 学校の先生, の shows…
9. 私（ ）友達
10. の at the end of a phrase can replace…
Frequently asked questions
Does の always mean possession?
No. It links nouns in many ways: owner, type, place, material or topic. Read it as a general “of” link.
Can I chain several の?
Yes, but keep it short. 私の友達の本 is fine; longer chains become hard to follow.