樺

Japanese white birch (Betula platyphylla var. japonica)

birch (esp. Japanese white birch)

Koreans residing on Sakhalin island

birch tree (esp. the Japanese white birch, Betula platyphylla var. japonica)

Japanese white birch oil

Karafuto (Japanese name for Sakhalin)

Treaty of Saint Petersburg (1875)

Sakhalin husky (dog breed)

reddish yellow

capelin

monarch birch (Betula maximowicziana)

monarch butterfly (Danaus plexippus)

willow ptarmigan (Lagopus lagopus)

chaga mushroom (Inonotus obliquus)

Japanese foliage spider (Chiracanthium japonicum)

Erman's birch (Betula ermanii)

ornamental variety of double weeping rosebud cherry

greater spotted eagle (Aquila clanga)

great grey owl (Strix nebulosa)

pink salmon (Oncorhynchus gorbuscha)