How much electricity does Tokyo use?

More than 90% of the transmission lines within the 23 wards of Tokyo are underground (as of 2016). In order to provide a large amount of electricity to city centers in an efficient manner, we use voltages of 500,000 V and 275,000 V due to the necessity of reduced transmission loss.

Why does Tokyo need underground substations?

Tokyo, known as a "world-leading commercial city" and for its "densely packed housing", also requires substations in order to stably provide electricity. Due to the limited amount of land in urban areas that is available for use, we have installed underground substations in some 200 locations such as under office buildings, schools, and temples.

How many underground substations are there in Tokyo?

Tokyo, known as a world-leading commercial city and famous for its densely packed housing, also requires substations to provide electricity stably. Due to the limited amount of land in urban areas, we have installed underground substations in more than 200 locations. Learn more here.

What is an outdoor substation?

An outdoor substation is where equipment such as transformers (control voltage), circuit breakers (stop power generation when there is an accident), and lightning arresters (protect equipment from lightning) are installed outside.

How many substations does TEPCO power grid have?

TEPCO Power Grid has installed some 1,600 substations at key points along these transmission routes to serve as voltage reducing equipment. Tokyo, known as a "world-leading commercial city" and for its "densely packed housing", also requires substations in order to stably provide electricity.