  We propose an inverse seesaw scenario under hidden $U(1)$ gauge symmetry,
having rather natural hierarchies among neutral fermion mass scales. The
hierarchies are derived from theory and experimental constraints. The theory
requires Majorana exotic masses have to be induced at one-loop level. The
experimental side requests that the Dirac mass terms has to be highly
suppressed to satisfy the constraints from the lepton flavor violations(LFVs)
such as $\mu\to e\gamma$. In order to induce such a small Majorana exotic
masses we introduce exotic fermions and bosons that also provide us additional
intriguing phenomenologies such as muon anomalous magnetic moment, dark matter
candidate as well as LFVs and deviations in leptonic $Z$ decays. We analyze
these phenomenologies including neutrino oscillation data numerically, and show
allowed region. Finally, we discuss the DM candidate in both the cases of
fermion and scalar boson, where we focus on rather lighter range that is equal
or less than 1 GeV. The dominant contributions originate from interactions of
hidden gauge sector, and we show allowed ranges for both cases.
