This is a Tsumugi
kyo-fukuro obi(shorter than usual fukuro obi) with 'kiribame'(patchwork) pattern.
Fabric with flowers and birds pattern with Sagara embroidery are used for patchwork.
Textile is silk, and it has soft to the touch.
Actual color is more staid than shown on photos.
Seam above Otaiko pattern will not show when tied. (first photo below the drawing image)
There are small stains and a folding line.
Please see photos for details.
Overall, it is in very good condition and can continue to be worn!