Lindera obtusiloba is a species of flowering plant in the Lauraceae

Lauraceae

The Lauraceae or Laurel family comprises a group of flowering plants included in the order Laurales. The family contains about 55 genera and over 3500, perhaps as many as 4000, species world-wide, mostly from warm or tropical regions, especially Southeast Asia and South America...

 family. Juvenile leaves are lobed (as the name suggests) and are deep purple, turning yellow in autumn.
Uses=
A Lindera obtusiloba water extract inhibited mast-cell

Mast cell

A mast cell is a resident cell of several types of tissues and contains many granules rich in histamine and heparin...

-derived allergic inflammation in vitro and vivo, suggesting it may have possible uses in allergic diseases such as allergic rhinitis, asthma and atopic dermatitis.