So this is a wooden stand meant to hold a banner pole vertical. In Japanese, I'm not quite sure what to call it. The most likely candidates are hatadai, daiwaku, and hatazaotate.
It's made entirely of pine, with no fasteners. I hand cut 20 mortise and tenon joints for assembly with glue. I darkened it with tannic acid (tea) and iron acetate (steel wool dissolved in white vinegar), then finished it with boiled linseed oil.
I was able to make it with wood I already had in the basement, including some mysterious 2x2 that was here when Sharon moved in more than 15 years ago.