Asarum caulescens; wild ginger species
A specific species of wild ginger native to East Asia. The Japanese name literally means 'two-leaf grass'. Compare with 二葉葵 (futaba aoi), a related plant.
See also: フタバアオイ
Asarum caulescens is a perennial herb that grows on forest floors in mountainous areas.
Around here, you can see Asarum caulescens flowers in spring.