The first section of the Fukagawa-Rumoi Expressway to open was a 4.4-kilometer-long (2.7 mi) section between its eastern terminus at Fukagawa Junction on the Dō-Ō Expressway to Fukagawa-nishi Interchange on 11 April 1998. The expressway was completed with the extension of its route west from Rumoi-Owada Interchange to Rumoi Interchange on 28 March 2020.[3]
^"深川・留萌自動車道 幌糠留萌道路(留萌る も い大和田IC~留萌IC)が 令和2年3月28日(土)15時に開通します!" [Fukagawa-Rumoi Expressway Rumoi Road (Rumoi-Owada IC-Rumoi IC) will open at 3:00 pm on Saturday, 28 March 2020!] (PDF) (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. 24 January 2020. Retrieved 4 April 2021.