Japanese phrase
___が問題だと思います。 ___ ga mon dai da to omo i ma su
Meaning
I think ___ is the problem.
When to use it
Identifies a factor as the likely source of a problem. The wording softens a direct criticism and suits polite discussion at work or in everyday situations.
Example dialogue
どこが問題ですか？ do ko ga mon dai de su ka
What seems to be the problem?
納期が問題だと思います。 nō ki ga mon dai da to omo i ma su
I think the deadline is the problem.