The Nishikigawa Seiryū Line is a Japanese railway line connecting Kawanishi and Nishikichō stations, all within Iwakuni, Yamaguchi. As the name suggests, the line parallels the Nishiki River (Nishiki-gawa). This is the only railway line Nishikigawa Railway operates. The third-sector company took former West Japan Railway Company line in 1987. The line was proposed to be extended to Nichihara, on the Yamaguchi Line, but was not completed. The company also operates bus lines and a travel agency.