Sub-orthodox formation - high variant
This formation has been adopted by Sakata, and others; but can't be called consistent. The enclosure lends itself to large scale development much better than the 3-3 point. Perhaps it is simply neutral as a plan, implying an interest in both territory and influence.
White 1 to break up the side is fairly urgent in the opening, but not of the highest priority. Black's extension to 2 in reaction is natural to preserve the influential effect of the enclosure, which would be diminished if White established a group on the right side.