Japanese phrase
___理由を教えてください。 ___ ri yū o oshi e te ku da sa i
Meaning
Could you tell me the reason for ___?
When to use it
Requests an explanation for an event or decision. The wording is polite and direct, and it is common when clarification is needed.
Example dialogue
予定を変えた理由を教えてください。 yo tei o ka e ta ri yū o oshi e te ku da sa i
Could you tell me why you changed the plan?
仕事の都合です。 shi goto no tsu gō de su
It was because of work.