It's almost become routine for Yoshiko Nakamura to wake up at 2 a.m. to a phone call from a desperate elderly person who has no one else to turn to.
"The TV is blaring," one senile caller cried, prompting the care worker in Tokyo's Ota Ward to dredge through her memory for the layout of her client's room.
"There's a plug right behind you," she remembers. "Why don't you disconnect the power?"