~且つ(かつ) => and N1
Line up, list
いつかの ... => Previously N4
Time
ふと => suddenly; accidentally; unexpectedly; unintentionally ~ N3
ふしがある => Seem N2
Speculation
からつくる/でつくる => made from; made with N4
いつしか => before one knows N2
Accept, agree
いつか => Since when (Don't know) N4
Time
ふとした ... => unexpected / incidental / little bitty N2
Expected
~こういうふう => like this N1
Means and methods
いつか ... た => Formerly (At some point) N4
Time
~かつて => once; before; formerly; ever; former N1
Time
いつか(は) => sometime; someday; one day N4
Future time