Historical Research on How a Park Located on a Floodplain Adjacent in the Downtown has been Changed over Time from Sociocultural Perspective in the Nakajima Park in Sapporo 論文 Akihiro Kobayashi ·2015-01-01 ·『Journal of The Japanese Institute of Landscape Architecture』 78(5) pp. 419-424 doi:10.5632/jila.78.419