  We present first results from a new exoplanet direct imaging survey being
carried out with the Subaru Coronagraphic Extreme Adaptive Optics project
(SCExAO) coupled to the CHARIS integral field spectrograph and assisted with
Keck/NIRC2, targeting stars showing evidence for an astrometric acceleration
from the Hipparcos and Gaia satellites. Near-infrared spectra from CHARIS and
thermal infrared photometry from NIRC2 constrain newly-discovered companion
spectral types, temperatures, and gravities. Relative astrometry of companions
from SCExAO/CHARIS and NIRC2 and absolute astrometry of the star from Hipparcos
and Gaia together yield direct dynamical mass constraints. Even in its infancy,
our survey has already yielded multiple discoveries, including at least one
likely jovian planet. We describe how our nascent survey is yielding a far
higher detection rate than blind surveys from GPI and SPHERE, mass precisions
reached for known companions, and the path forward for imaging and
characterizing planets at lower masses and smaller orbital separations than
previously possible.
