Meaning of ファースト in Japanese

I imagined my first kiss would be more romantic.

Most Americans do not object to my calling them by their first names.

I'm sorry we couldn't get you a seat on first class.

I don't have much time, so I'm going to drop in at a fast-food restaurant.

Please excuse me for calling you by your first name.

I'd like to travel first-class.

The first baseman is the Achilles heel of our team.

This may be because of a change in people's attitude toward marriage and the sharp increase of fast food restaurants and convenience stores which are open 24 hours a day and enable young people to live more easily.

Please excuse me for calling you by your first name.