Sophora japonica is a tree belonging to the genus Sophora in Butterfly Family, and its pinnate compound leaves are15-25cm long. Leaf axis is hairy and the base is enlarged; Leaflets 9- 15, ovoid, 2.5-7.5cm long,1.5-3cm wide, tapering at the top, broadly cuneate at the base, grayish white at the lower part and sparsely pubescent.