を前提に => On the premise of N1
Premise
... を ... という => called; named; that ~ N4
Speaking
じつをいうと => Frankly speaking N2
Story topic
を…という => to be called, said, named N3
Command, definition
~をたて(~を経て)      => through; after; via N1
を => Auxiliary words N5
~のを => Nominalize verbs N5
Nominalization
を通じて/を通して => through; via; throughout; by ~ N2
をもって => with... N1
Means and methods
を~として => as N2
それを => Despite that ... N2
Things do not match the prediction
なかを => In this situation... N5
Base, base