Derby Owners Club World Edition is a horse racing simulator developed by Hitmaker and published by Sega for the Sega NAOMI arcade platform. It is an update to Derby Owners Club 2000, modified to appeal to the western market. For instance, the Yushun Himba and Tokyo Yushun are renamed the American Oaks and American Derby respectively. A further update was released as Derby Owners Club World Edition EX, which added more horses and fixed some bugs.