勢力圏 せいりょくけん Meanings Noun sphere of influence Kanji 勢 force. Read as セイ. 力 power. Read as リョク. 圏 sphere. Read as ケン. Words containing 勢力圏 勢力圏内 (せいりょくけんない) within the sphere of influence (of) Jinuma: Japanese Dictionary · Word lists