This is a Fukuro obi
with elegant 'Kiku'(chrysanthemum) and 'Ume' (plum blossom) in slanted lattice pattern, which is woven.
Gold foil threads included in fabric and the pattern twinkle gently.
Textile is silk, and it has soft to the touch.
There is a signature of the dyer on Tare end.
It does not have any folding lines, and it seems unworn.
Snag above Otaiko pattern may be noticed.
Please see photos for details.
If you do not mind the small flaws mentioned, it can continue to be worn.