Boehmeria japonica

Boehmeria japonica is a species of flowering plant in the nettle family (Urticaceae). It native to eastern Asia, where it is found in China, Japan, South Korea, and Taiwan. Its natural habitat is extremely variable, being found in areas that range from wet to dry, and from shaded to open. It is tolerant of disturbance, and can be found growing on walls and roadsides. It is considered to be a common species in most of Japan....read more on Wikipedia.