札幌市に立地する創成川公園は、アンダーパス連続化事業により創出された上部空間に、川と一体的に整備された。
基本方針は、川で分断されていた「①東西の市街地をつなぐ」こと、南北に「②水と緑をつなぐ」こと、「③歴史をつなぐ」ことの3点であった。
東西方向の見通しを良くし、安全で開放的な水辺空間を創出するとともに、東西から円滑にアクセスできる広場を配置することで東西の市街地をつなぎ、創成川の親水性を高め、大通公園や北海道大学、中島公園など周辺の都市緑地のネットワークに組み込むことで、札幌の水と緑をつないだ。また、開拓当初から札幌の発展や市民生活を支えてきた直線的な河川形状や、歴史的遺産（復元された創成橋、里程元標等）を活かした計画とすることで、札幌の歴史をつなぎ、市民の誇りを札幌の未来へとつなげる場とすることを提案した。
Sosei River Park is situated at the eastern edge of downtown Sapporo and 8 block long north and south along the Sosei River. The river is actually a man-made canal and used to be the main route to bring construction materials into Sapporo by boat when the city was opened in the end of the 19th century. The area was the center of the city in those days, but as trains and trucks replaced boats, the importance of the river gradually decreased and the center of the city also moved to the west, where Sapporo station is nearby.
The Sosei River was deserted and became an inaccessible space due to its rapid stream and over-grown willow trees. At this point, the river was regarded as nothing but a physical barrier to block the growth of the city to the east beyond. The city wanted to revitalize the river and turn it to a more user-friendly, lively space, and held a design competition in 2005.
D+M participated in the competition and proposed various open spaces along the river where visitors from either side of the city can easily approach. It also proposed reconstruction of historic remnants including the Sosei Bridge and the original milestone. The riverbed was proposed to be accessible by installing a large duct pipe underground for the main flow, by which the surface water can be kept consistent and calm.
D+M was selected in the competition and undertook design development and prepared construction documents. The park was completed in 2011 and soon became a new landmark of Sapporo city. It is now visited and used frequently by citizens and visitors as a precious urban water park as well as a unique facility to tell us the history of Sapporo.
位于札幌市的创成川公园是通过连贯地下通道项目在上部空间与河流一起整备的。
基本方针是：①连接被河流分隔的东西向市区，②南北方向连接水和绿色，③连接历史。
通过改善东西向的视野，创造一个安全开放的滨水空间，并配置从东西方向都可以顺利进入的广场，来连接东西市区，提高创成川的亲水性，并将其纳入大通公园、北海道大学和中岛公园等周边城市绿地的网络中，从而连接札幌的水和绿。此外，通过利用支撑札幌发展和市民生活的直线河道形状和历史遗产（如复原的创成桥、里程碑等）制定计划，以连接札幌的历史，提议将其作为市民自豪感与札幌未来的连接之地。