ICOCA (Japanese: イコカ, romanized: Ikoka) 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).

[1] ICOCA is an abbreviation of "IC Operating Card" and is also a play on the phrase "Iko ka" (行こか), an informal, Kansai dialect invitation meaning "Shall we go?"

Platypus characters for the children's ICOCA also exist and are named Icota (イコ太, Ikota) and Icomi (イコ美, Ikomi).

Since March 2013, ICOCA has been part of Japan's Nationwide Mutual Usage Service, allowing it to be used in major cities across the country.