反面 => while, although; on the other hand~ N2
... 前に => Before ... N4
Relationship before and after
一方では...他方では => On the one hand N2
Compare
... 前に => ... in front of, before N4
Relationship before and after
前に => before; in front of ~ N5
… 方 => the way to do something N4
Description
を前提に => On the premise of N1
Premise
を[境「さかい」]に => A is set as a border/limit N1
Degree/ Level/Amount
手前 => considering; before; in front of; one’s standpoint N1
一方だ => more and more; continue to ~ N2
~[前「まえ」]に => Before N/Vる(occurs/happens) N5
Time
一方 => on one hand, on the other hand; although ~ (conjunction) N2