The company was founded on July 8, 1903, while the tram line was opened on May 2, 1904. The company also operated heavy railway line called Aki Line (安芸線?), but it was closed in 1974. The company is commonly known as Toden(土電?) among locals, while people in other prefectures tend to call it Tosaden(土佐電?), as the word Toden can be confusing with Tokyo Metropolitan Tramway, which is commonly called Toden(都電?).
There are three lines with 76 stations, covering a total distance of 25.3 km. It is the second longest tram network in Japan, after Hiroshima Electric Railway. The network in Kōchi, however, has suffered from declining ridership since the 1960s. The company painfully strives by introducing newly built stations and cars, without much success. The Government of Kōchi Prefecture, as well as that of Kōchi City are considering plans to support the company.