  The nonlocalized aspect of clustering, which is a new concept for
self-conjugate nuclei, is extended for the investigation of the N{\not=}Z
nucleus ${}^9$Be. A modified version of the THSR
(Tohsaki-Horiuchi-Schuck-R\"opke) wave function is introduced based on the
container picture. It is found that the constructed negative-parity THSR wave
function is very suitable for describing the cluster states of ${}^9$Be. Namely
the nonlocalized clustering is shown to prevail in ${}^9$Be. The calculated
binding energy and radius of ${}^9$Be are consistent with calculations in other
models and with experimental values. The squared overlaps between the THSR wave
function and the Brink+GCM wave function for the $3/2^-$ rotational band of
${}^9$Be are found to be near 96%. Furthermore, by showing the density
distribution of the ground state of ${}^9$Be, the {\pi}-orbit structure is
naturally reproduced by using this THSR wave function.
