Nanka Railway (kyūjitai: 南樺鐵道株式會社; shinjitai: 南樺鉄道株式会社; Nankai Tetsudō kabushiki gaisha) was a private railway company in Karafuto Prefecture during the days of the Empire of Japan. Founded in April 1925 as a subsidiary of Ōji Paper, the company operated the Nanka Line that ran 18.6 km (11.6 mi) from Shinba Station on the East Coast Line to Rūtaka Station in what was then the town of Rūtaka. The company also operated a network of buses connecting Rūtaka and, via Rūtaka, Honto with the prefectural capital of Toyohara and also with Ōdomari, now Korsakov, where passengers could connect with the Chihaku ferry to Wakkanai.