We present new high-resolution ( \sim 0 \farcs 09 ) H -band imaging observations of the circumstellar disk around the T Tauri star SU Aur .
Our observations with Subaru-HiCIAO have revealed the presence of scattered light as close as 0 \farcs 15 ( \sim 20 AU ) to the star .
Within our image , we identify bright emission associated with a disk with a minimum radius of \sim 90 AU , an inclination of \sim 35 \arcdeg from the plane of the sky , and an approximate P.A .
of 15 \arcdeg for the major axis .
We find a brightness asymmetry between the northern and southern sides of the disk due to a non-axisymmetric disk structure .
We also identify a pair of asymmetric tail structures extending east and west from the disk .
The western tail extends at least 2 \farcs 5 ( 350 AU ) from the star , and is probably associated with a reflection nebula previously observed at optical and near-IR wavelengths .
The eastern tail extends at least 1″ ( 140 AU ) at the present signal-to-noise .
These tails are likely due to an encounter with an unseen brown dwarf , but our results do not exclude the explanation that these tails are outflow cavities or jets .