  Motivated by the recently observed hypernucleus (Kiso event) $^{15}_{\Xi}$C
($^{14}$N$+\Xi^-$), we identify the state of this system theoretically within
the framework of the relativistic-mean-field and Skyrme-Hartree-Fock models.
The $\Xi N$ interactions are constructed to reproduce the two possibly observed
$\Xi^-$ removal energies, $4.38\pm 0.25$ MeV or $1.11\pm 0.25$ MeV. The present
result is preferable to be $^{14}{\rm N}({\rm g.s.})+\Xi^-(1p)$, corresponding
to the latter value.
