About HATAKEDA KENJI
About JR九州
About アルミニウム
About AC electric railcar
About secondary battery
About running test
About rolling stock apparatus
About power converter
About mass production
About interlocking device
About structural design
About DENCHA
About AC electric railcar
About storage battery
About 蓄電池電車
About mass production
About Powered vehicles
About 輸送
About 交流
About 架線
About 蓄電池
About 電車
About 量産
About 開発