YOU SAID:

What sort of reason do you have

INTO JAPANESE

どのような理由があります。

BACK INTO ENGLISH

What reason.

INTO JAPANESE

どのような理由です。

BACK INTO ENGLISH

That's what why.

INTO JAPANESE

それがなぜ。

BACK INTO ENGLISH

It is why.

INTO JAPANESE

それは理由です。

BACK INTO ENGLISH

It is the reason why.

INTO JAPANESE

それはなぜ理由です。

BACK INTO ENGLISH

It is the reason why.