Which is found in Japan, Emmenopterys or Nipponanthemum?
Emmenopterys:  The genus is found in China, Burma, Thailand, and Vietnam. Nipponanthemum: Nipponanthemum nipponicum, common names "Nippon daisy" or "Montauk daisy," is a plant species native to coastal regions of Japan but cultivated as an ornamental in other regions.
Nipponanthemum