  Buscher duality is a sigma-model duality, implemented by transformation of
the target space. Not only in the case of a flat target space, but in a general
background, should the Buscher duality reduce to the T-duality familiar in the
flat-space string context. We exhibit this reduction explicitly using a pp-wave
background as a tractable example. String theory is solved in a compactified
Nappi-Witten background and the Buscher-dual theory is likewise solved. The
Hamiltonian is computed in both cases, and the results are verified to be
T-dual.
