The Kisei Main Line is a railway line that parallels the coastline of the Kii Peninsula in Japan between Mie Prefecture and Wakayama Prefecture. The name takes the kanji characters from the names of the old provinces of Kii (紀伊) and Ise (伊勢).

The West Japan Railway Company, also referred to as JR West , is one of the Japan Railways Group companies and operates in western Honshu. It has its headquarters in Kita-ku, Osaka. It is listed in the Tokyo Stock Exchange, is a constituent of the TOPIX Large70 index, and is also one of only three Japan Railways Group constituents of the Nikkei 225 index: the others are JR East and JR Central. It was also listed in the Nagoya and Fukuoka stock exchanges until late 2020.