Pterocarya rhoifolia

Pterocarya rhoifolia (Japanese wingnut, Japanese: "sawagurumi") is a species of tree in the Juglandaceae family that is widely distributed throughout Japan, and also found native to China in the Laoshan District in eastern Shandong Province.
The tree flourishes in moist areas along riverbanks and mountain streams, and attains in height, flowering from May–July.
It is a soft light wood, with the heartwood yellowish-white in color, which has been used as a substitute of "kiri" ("Paulownia tomentosa"), for example, to make "geta" clogs that are imitations of "kiri"-geta. It is straight-grained and the pore pattern on the surface provides the wood with a handsome appearance.