[impute]

How did you "run into each other, from time to time"?

This seems to be the key part. There's research that shows that relationships are built via multiple, random encounters. Do you think he still would have dropped by your office if you hadn't had these run ins?

[ChrisMarshallNY]

I would go to Tokyo, once or thrice a year. Long trip. I don't really miss it.

We'd usually run into each other at the train station, or in the corridors of the meeting room floor.

Our meets were always quite brief and serendipitous. We were in very different orbits.