ABSTRACT This essay discusses the Subaru Telescope on Mauna Kea within a tradition of Japanese militarism and contextualizes the settler colonial dynamics of its construction in Hawaiʻi. The first half analyzes the telescope as a symbol of US-Japanese interimperial partnership and Asian settler colonialism through Japanese astronomers’ claim to “nostalgia” in Hawaiʻi. The second half analyzes Nicole Naone’s film “Mauna Fuji,” which counters Japanese temporalities of nostalgia by critically juxtaposing Mauna Kea and Mt. Fuji. Through a relational reading of Mauna Kea and Mt. Fuji’s shared conditions of militourism, this essay attends to the uneven atmospheric relations between both mountains.