じゃないが => It's not that... but... N4
How to say the beginning
ゃしない => Don't/Doesn't A (at all) N1
Will, Decision, Doing
...し, ...し, (それで) ... => Because... and..., so... N4
List
しかしながら => however, nevertheless N2
Things do not match the prediction
ふしがある => Seem N2
Speculation
...し, ...し, (それに) ... => besides; in addition; also; moreover ~. N4
List
じゃありませんでした => was not, were not N5
Emphasize negative meaning
いらっしゃる => to be; to come; to go (polite version) N4
にしてからが => Even... N1
Demonstrate by example
~としたことが => ~ surprised N1
Surprised
んじゃ => If ... then... N4
Condition (hypothetical condition)
~じゃ(では)あるまいし => isn't it; I wonder if it's not ~ N1
Invite and advise