I thought so too, but then I realized that Sasuke and Oro could be standing between the house and the posts so they r looking at the house with the posts behind them. Or they are standing all the way past that building with everything behind them.. It is really hard to tell, though.. The posts looks a little different, but again, Kishi is inconsistent with his drawing.
I'll put my money on Shisui too, the guy's a total mystery just like Oro's scroll.