  We present high-contrast observations of 68 young stellar objects (YSOs)
explored as part of the SEEDS survey on the Subaru telescope. Our targets are
very young ($<$10 Myr) stars, which often harbor protoplanetary disks where
planets may be forming. We achieve a typical contrast of
$\sim$$10^{-4}$--$10^{-5.5}$ at an angular distance of 1\arcsec\ from the
central star, corresponding to typical mass sensitivities (assuming hot-start
evolutionary models) of $\sim$10 ${\rm M_J}$ at 70 AU and $\sim$6 ${\rm M_J}$
at 140 AU. We detected a new stellar companion to HIP 79462 and confirmed the
substellar objects GQ Lup b and ROXs 42B b. An additional six companion
candidates await follow-up observations to check for common proper motion. Our
SEEDS YSO observations probe the population of planets and brown dwarfs at the
very youngest ages; these may be compared to the results of surveys targeting
somewhat older stars. Our sample and the associated observational results will
help enable detailed statistical analyses of giant planet formation.
