New Canaan is a far cry from Tokyo, but the distance hasn’t stopped a small coterie of Japan’s leading cultural luminaries from intermittently decamping to Connecticut. Kazuyo Sejima and Ryue Nishizawa, the principals of Pritzker Prize-winning architecture firm SANAA, are often on site in the small town located an hour’s drive from New York City, supervising the construction of their latest North American project — dubbed “The River” — at Grace Farms. The duo won the commission to create a large-scale, multi-use complex there in 2010, and shortly thereafter brought Yuko Hasegawa, chief curator of the Museum of Contemporary Art in Tokyo, to the attention of their client. Sharon Prince, the president of the non-profit Grace Farms Foundation, hired her too. Hasegawa is now finalizing a series of commissioned artworks for the October 9 inauguration of Grace Farms that includes new pieces by Thomas Demand, Susan Philipsz, Teresita Fernandez, and Olafur Eliasson. Another site-specific artwork by Beatriz Mihalzes is planned for spring 2016.