時圏 じけん noun (common) (futsuumeishi) 時圏じけん Noun English JMdict (multilingual) 1 noun (common) (futsuumeishi) astronomy hour circle;circle of declination 漢字 kanji used 時 time, hour 10画 圏 sphere, circle 12画
時圏じけん Noun English JMdict (multilingual) 1 noun (common) (futsuumeishi) astronomy hour circle;circle of declination
Shirabe