A taiko musuba (square knot), 2 part Nagoya type obi. Known as a tsukure obi, tsuke obi or easy obi.
Hakata design in the weave
Made and bought in Japan
Most obi, including two-part, pre-shaped taiko knot obi, require an obijime and obiage to hold the rear knot in place, both of which are always bought separately. With a taiko knot style obi, an obi makura (obi bustle pad) is worn inside the knot too, to pad it out at the top, though a few two-part taiko obis have a makura already inside the knot, however, most don't. One can buy actual obiage, obijime and makura or one can improvise with these items
Please be aware that different monitors display colour slightly differently. Therefore the colour in the photos and description is a guide only

Condition:
Excellent

Measurements approx:
Rear knot section 29cm wide x 33cm deep
Sash 144cm long 14cm deep