YOU SAID:

「 “I contacted my mother about that when I arrived at Tokyo Station.”」

INTO JAPANESE

「東京駅に着いた時に母に連絡しました。」

BACK INTO ENGLISH

I contacted my mother when I arrived at Tokyo Station.

INTO JAPANESE

東京駅に着いたら母に連絡しました。

BACK INTO ENGLISH

When I arrived at Tokyo Station, I called my mother.

INTO JAPANESE

東京駅に着くと、私は母に電話しました。

BACK INTO ENGLISH

When I arrived at Tokyo Station, I called my mother.