成層圏飛行機 せいそうけんひこうき Meanings Noun stratoplane (hypothetical type of airplane) Kanji 成 become. Read as セイ. 層 layer. Read as ソウ. 圏 sphere. Read as ケン. 飛 fly 行 go. Read as コウ. 機 machine. Read as キ. Jinuma: Japanese Dictionary · Word lists