Translation

偶然にも / 奇しくも / たまたま

Meaning

Happening by chance or occurring at the same time without a planned connection.

Examples

• We arrived at the train station coincidentally at the same moment.
  We arrived at the train station coincidentally at the same moment.
• Coincidentally, both of our companies decided to launch the new product on the same day.
  Coincidentally, both of our companies decided to launch the new product on the same day.