The Tokyo Metropolitan Government said Friday that a Chubu Electric Power Co.-affiliated firm will supply power to 48 of its facilities instead of Tokyo Electric Power Co.

The metro government contracted with Diamond Power Corp., based in Tokyo, in which Nagoya-based Chubu Electric plans to take an 80 percent stake soon, to supply a total of 9,850 kw to the 48 facilities, including vocational skills development centers, from Oct. 1.

Before the March 2011 earthquake and tsunami disaster devastated the Tohoku region and led to three reactor meltdowns at Tepco’s Fukushima No. 1 atomic plant and the effective shutdown of the nation’s overall nuclear energy system, the metro government had relied on Tepco to supply most of 1 million kw for about 1,200 facilities, including the main government buildings in the Shinjuku area.

The metro government plans to set up new power supply contracts for a total of 271 facilities with four new energy providers, including Diamond Power, from October.

As power supply by new providers is expected to increase from 40,000 kw in April to 96,000 kw, the metro government is anticipating yearly savings of about ¥300 million in power costs.