Does this have a name or cultural significance?

I’m looking at Japanese makeup for a character I’m designing, I’ve seen this line down the middle of the lips a few times and think it’s beautiful but want to know if it has any significant meaning or associations I should know. And if it has a name.

I was going to include an image but it’s not possible on this sub but not sure where else to ask this question

by No_Path_3265

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