This is a Nagoya obi in otaiko gara.
Nagoya obi were first produced at the end of the Taisho era, and are shorter than the more formal fukuro and maru obi. A portion of Nagoya obi fabric is folded and stitched in half to make tying easier.
Gara refers to the orientation, arrangement, and surface area of the patterns and pertains to a specific trend and obi tying style. The patterning in the Otaiko gara type is minimal. A few concentrated spots of patterned motif lie on the obi while the rest is left blank. This style was invented during the Edo period (1615-1868) by the female entertainers in Fukugawa, an entertainment district in present-day Tokyo.
Black Nagoya obi with interwoven beige and gold diamond motifs depicting orange, pale blue, and lavender peonies and chrysanthemums.