It's probably easier to explain the situation because I know there are multiple ways in which "about" could be used.
I am speaking with a friend and I tell them I went to a meeting. The next thing I would like to say is "the meeting was about leaving Japan"
To generalize this grammar point even more I guess I'm asking how I would make I sentence that say "this is about this"
I have a super basic understanding of Japanese so I'm trying to learn as I message/slash talk to people.
日本から出国することについての会議でした。
にほんからしゅっこくすることについてのかいぎでした。
nihon kara shukkoku suru koto ni tsuite no kaigi deshita.
japan from leaving-country doing about in regard meeting was.
The meeting was about leaving Japan.
...
So if you were to say this: 日本から出国する it would mean "I am leaving Japan", but because you put "koto" to normalise it, then "ni tsuite" to tell them the following words are in regards to it, then "no" to show the meeting was for what came before it.
This is quite complex grammar to get your head around if you're a beginner. If you're having trouble trying to understand it, I'd suggest studying から、について、こと separately to this example, then come back and apply what you've studied to your question.
