論文刊行：Nopprapun P, Boontanon SK, Fujii S, Harada H (2020) Human-associated Escherichia coli marker: Important indicator to evaluate river water quality and treatment ability of surrounding wastewater treatment plants. Thai Environmental Engineering Journal 34: 35-43.
図書刊行：Takada A (2020) The ecology of playful childhood: Caregiver-child interactions among the San of southern Africa. New York: Palgrave Macmillan. 244p.
論文刊行：Nhu Y et al. [Harada H = 4th author] (2020) Interspecific variation in foliar nutrients and isotopes of submerged macrophytes in the Cau Hai Lagoon, the typical brackish lagoon in Vientam. Botanica Pacifica. A journal of plant science and conservation 9: 131-138.
論文刊行：Dang TTL, Le VT, Harada H, Duong VH, Pham KL, Duong TC (2020) Enhancement of water disinfection efficiency using UV radiation with the aid of a liquid-film-forming device. Vietnam Journal of Science and Technology 58(3A): 203-210.
論文刊行：Otsuka R, Yamakoshi G (2020) Analyzing the popularity of YouTube videos that violate mountain gorilla tourism regulations. PLoS ONE 15: e0232085
論文刊行：Hanya et al. [Otsuka R = 9th author] (2020) Fermentation ability of gut microbiota of wild Japanese macaques in the highland and lowland Yakushima: In vitro fermentation assay and genetic analyses. Microbial Ecology. doi: 10.1007/s00248-020-01515-8.
論文刊行：Albert-Daviaud et al. [Sato H = 7th author] (2020) The ghost fruits of Madagascar: Identifying dysfunctional seed dispersal in Madagascar’s endemic flora. Biological Conservation 242: 108438.
