The Okayama Electric Tramway (岡山電気軌道?, Okayama Denki Kidō) is a transportation company in Okayama City, Japan. The private company operates tram lines and bus lines.The company was founded in 1910, while their first tram line was opened in 1912. This is one of the few Japanese railway operators that maintain their original corporation names from the foundation in Meiji Period. The company or its lines are truncated as Okaden (岡電?). The company is a core member of Ryōbi Group, another core member being Ryōbi Bus. From October 1, 2006, together with Ryōbi Bus and Shimotsui Dentetsu, another bus company, Okaden introduced Hareca, a smart card ticketing system. They accept PiTaPa and ICOCA as well.