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.

ICOCA is a rechargeable contactless smart card used on the JR West rail network in Japan. The card was launched on November 1, 2003, for usage on the Urban Network, which encompasses the major cities of Osaka, Kyoto and Kobe (Keihanshin). It is now usable on many other networks nationwide. The ICOCA area has gradually been expanded, and now includes the San'yo region through the Okayama and Hiroshima urban areas, and some lines in northern Shikoku, San'in and Hokuriku regions as of 2024.