The company was established on October 1, 2014, by merging the businesses of Tosa Electric Railway (土佐電気鉄道,Tosa Denki Tetsudō?), a tram and bus company, as well as its subsidiary Tosaden Dream Service (土佐電ドリームサービス?), a bus company, and Kōchiken Kōtsū (高知県交通?), a bus company.
Tosa Electric Railway was founded on July 8, 1903, and the tram line was opened on May 2, 1904. The company also operated a heavy railway line called Aki Line (安芸線?), but it was closed in 1974. The company was 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 was commonly called Toden(都電?).
Tosa Electric Railway and Kōchiken Kōtsū introduced DESUCA, a smart card ticket system, from January 2009.
In June 2014, the shareholders of Tosa Electric Railway and Kōchiken Kōtsū, both in the state of insolvency, approved the reconstruction plan, under which the companies' businesses be transferred to the newly established company funded by Kōchi Prefecture and other 12 municipalities. The name of the company was selected from 1,235 proposals from the public.
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.