YOU SAID:

"I ran into an old friend by chance at Tokyo Station."

INTO JAPANESE

「東京駅で偶然昔の友達に会った。」

BACK INTO ENGLISH

I happened to meet an old friend at Tokyo Station.

INTO JAPANESE

東京駅で偶然昔の友達に会いました。

BACK INTO ENGLISH

I happened to meet an old friend at Tokyo Station.