The associated production of a scalar (H) and pseudoscalar (P) Higgs boson at the e+e- collider TRISTAN at KEK is discussed within the framework of minimal supersymmetry. We first discuss constraints on the model from the nonobservation of radiative decays of the. We then show that a substantially larger region of parameter space can be probed already at s=60 GeV, where a total HP cross section in excess of 1 pb is possible. We discuss the clean +- pair signal in some detail and show how its opening angle can be used to reconstruct the mass of the parent Higgs boson. Some remarks on purely hadronic decay final states are also presented.