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2. Geospatial Information Authority of Japan (2000) The results of research on changes of wetland areas in Japan. https://www.gsi.go.jp/kankyochiri/shicchimenseki2.html. Accessed 23 Oct 2021
3. Hino T, Kamii T, Murai T, Yoshida R, Sato A, Tachiki Y, Akamatsu R, Yoshida T (2017) Seasonal and year-round use of the Kushiro wetland, Hokkaido, Japan by sika deer (Cervus nippon yesoensis). Peer J 5:e3869
4. Hokkaido Government (1987) Report of the ecological research on Yezo sika deer. (in Japanese)
5. Hokkaido Government (2016) Report on broad area survey of sika deer distribution (in southern part). (in Japanese)