のでは => if N3
Condition (hypothetical condition)
~のは…ぐらいのものだ => only (emphasis) N1
Limit
というのは => because N2
... というのは => It means... N3
Explain
そのはんめん(では) => on the other hand~ N3
Compare
たものではない => Impossible N2
Evaluate
のは…からだ => The reason... is because... N4
Cause, reason
~には~の~がある      => has its own~ N3
Characteristic
とはいうものの => having said that; be that as it may N2
Things do not match the prediction
の[上「うえ」]では => As… N4
Situations and Experiences
…のも無理 (は) ない => It's natural for... N3
Evaluate
…のではなかったか => Wasn't it…? N2
Doubt