助詞N5
〜の
of / possessive
Structure
N1 + の + N2
Explanation
Indicates possession, property, or description. N1+の+N2 = N2 of N1. Also used as pronoun (omitting noun) and nominalizer.
Examples
これは私の本です。
This is my book.
あの赤いのは誰のですか。
Whose is that red one?
Note
の can replace a noun: 私のです = mine. のは/のが/のを for nominalization: 走るのが好きです.