星界 せいかい Meanings Noun Seikai (series of science fiction novels by Hiroyuki Morioka) Kanji 星 star. Read as セイ. 界 realm. Read as カイ. Words containing 星界 星界の報告 (せいかいのほうこく) Sidereus Nuncius (treatise by Galileo Galilei; 1610) Jinuma: Japanese Dictionary · Word lists