About YOKOYAMA AKIHIKO
About transmission system(electric power)
About dispersed power source
About information technology
About solar photovoltaic generation
About electric automobile
About hot water supplying apparatus
About system operation
About secondary battery
About system stability
About cooperative control
About duplex communication
About smart grid
About heat pump water heater
About power system operation
About Electric power system in general
About グリッド
About 構築