非常用電源 ひじょうようでんげん Meanings Noun emergency power supply; backup power; emergency power source Kanji 非 non-. Read as ヒ. 常 usual. Read as ジョウ. 用 use. Read as ヨウ. 電 electric. Read as デン. 源 source. Read as ゲン. Jinuma: Japanese Dictionary · Word lists