The Hokutosei (北斗星) was a limited express sleeping car train service in Japan which operated between Ueno Station in Tokyo and Sapporo Station in the northern island of Hokkaido, taking approximately 16½ hours. It was operated jointly by East Japan Railway Company and Hokkaido Railway Company from March 1988. The service became a seasonal service from the 14 March 2015 timetable revision, and was completely discontinued in August 2015, in preparation for the opening of the Hokkaido Shinkansen.

Sapporo Station is a major railway station in Kita-ku, Sapporo, Hokkaido, Japan. It is served by Hakodate Main Line and other lines of Hokkaido Railway Company, and is also connected to the Subway Sapporo Station.