On January 2004, Toei Electric System Co., Ltd. was established by the capital Of 10 million yen. The company started the business on serving construction of electric power, electric line and maintenance services.
On 24th July 2008, Kantou Maintenance Co., Ltd. had established for expansion
the constructionand maintenance business all over the Kanto area.
On 4th August 2015, Kantou Maintenance Asia Co., Ltd. has been established
with the capital of 10 million baht in Thailand as a business of electric system installation and maintenance for electric train worldwide especially for any project in Asia zone.