Ex situ conservation efforts to prevent the species' extinction are ongoing, including at the University of Liverpool's Ness Botanic Gardens[1] and the Bedgebury National Pinetum.

[3] The Chichibu birch is very long-lived due to its sprouting habit, but its self-incompatibility means two individuals must be close enough together to cross-pollinate, making seed production unreliable in smaller populations.

[2][7] Chichibu birches are extremely rare in the wild, growing only on a handful of limestone outcrops in the mountains of the Japanese island of Honshu.

[9] Serious ex situ conservation efforts to prevent the Chichibu birch's extinction began in 1986, when Tetsuo Satomi collected seeds from the Okuchichibu Mountains site and sent them to Hugh McAllister, a botanist at the University of Liverpool's Ness Botanic Gardens.

[3] In 2014, an Anglo-Japanese expedition to the Okuchichibu Mountains collected roughly 1,000 B. chichibuensis seeds (of which around 100 germinated) in order to increase the genetic diversity of cultivated specimens.