ASONUMA, J. Mountain system of Hokkaido. Hokkaidōchō (Gouvernement de Hokkaidō), Sapporo, 1892. 380 x 550 mm. Folding color lithographed map, dissected into six linen-backed sections. Paper slightly browned. Bilingual English–Japanese map of Hokkaido showing elevations, volcanoes, and routes for geological observations, with an inset of Chishima (Kuril Islands).