Hantaviruses are harbored by multiple small mammal species in Asia, Europe, Africa, and the Americas. To ascertain the geographic distribution and virus-host relationships of rodent-borne hantaviruses in Japan, Vietnam, Myanmar, and Madagascar, RNA™-preserved lung tissues of 981 rodents representing 40 species, collected in 2011-2017, were analyzed for hantavirus RNA by RT-PCR. Our data showed Hantaan orthohantavirus Da Bie Shan strain in the Chinese white-bellied rat () in Vietnam, Thailand; orthohantavirus Anjo strain in the black rat () in Madagascar; and Puumala orthohantavirus Hokkaido strain in the grey-sided vole () in Japan. The Hokkaido strain of Puumala virus was also detected in the large Japanese field mouse () and small Japanese field mouse (), with evidence of host-switching as determined by co-phylogeny mapping.