Vintage Japanese Hake Flat Wood and Goat Hair Paint Brush

I picked up this Japanese brush from the studio of an artist's estate sale just because I thought it was pretty. It is a Hake brush, used for blending watercolors and applying gesso, paste, or varnish. The  brush features what I believe are goat hair bristles stitched to the wooden handle, which has a hole near the end for hanging. 

12" long x 3" wide x 1/4" deep. In good vintage condition, with light wear and some spotting to the wood on one side.