The government called on households and businesses in Tokyo and surrounding areas to reduce their electricity usage Monday and will ask the same for Tuesday due to heightened demand as Japan braces for a lengthy and hot summer after an early end to the rainy season.The industry ministry issued its first-ever power supply advisory a day earlier, urging people in Tokyo Electric Power Company Holdings Inc.'s service area to take energy-saving steps between 3 p.m. and 6 p.m. Monday, such as turning off lights that are not in use.As the capital braces for potential shortages of increasingly expe…READ FULL ARTICLE