海鷂魚[ei] ray (fish)
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一天四海[ittenshikai] the world
雲海[unkai] sea of clouds
沿海[enkai] coast

遠海[enkai] deep sea
黄海[koukai] Yellow Sea
温海[atsumi] warm sea
海の幸[uminosachi] seafood

運輸省[unyushou] Ministry of Transport
外務省[gaimushou] Ministry of Foreign Affairs
各省[kakushou] each ministry
冠省[kanshou] Forgive me for dispensing with the preliminaries, but I hasten to inform you that...
帰省[kisei] homecoming

教育省[kyouikushou] Department of Education
省みる[kaerimiru] to look back (e.g. over shoulder or at the past)
厚生省[kouseishou] Ministry of Health and Welfare (now Ministry of Health, Labour and Welfare)
国防総省[kokubousoushou] National Military Establishment
国務省[kokumushou] State Department

一軍[ichigun] an army
１等軍曹[ittougunsou] sergeant first-class
一泊行軍[ippakukougun] an overnight march
援軍[engun] reinforcement
海軍[kaigun] navy

凱旋軍[gaisengun] returning victorious army
救世軍[kyuuseigun] Salvation Army
共産軍[kyousangun] communist army
郷軍[gougun] veteran
空軍[kuugun] Air Force