This tool helps to unravel tangled thread.
It is an ancient Japanese tool that is mentioned as far back as the Manyoshu (a collection of poems dating to around 600-700A.D.)!
Details
[2-pronged Tatari]
Depth : About 22cm
Width : About 66cm
Height : About 87.5cm
[1-pronged Tatari]
Depth : About 22cm
Width : About 33cm
Height : About 87.5cm