Breakdown of kono mondai wa keikaku no shougai desu.
Questions & Answers about kono mondai wa keikaku no shougai desu.
この means this and directly modifies the noun that follows it.
So:
- この問題 = this problem
You do not say このの問題.
Words like この, その, and あの already attach directly to a noun.
Compare:
- この問題 = this problem
- その問題 = that problem
- あの問題 = that problem over there
If this stands alone, Japanese uses これ instead:
- これは問題です。 = This is a problem.
