碧海 へきかい Meanings Noun blue sea; blue expanse of water Kanji 碧 blue; green. Read as ヘキ. 海 sea. Read as カイ. Words containing 碧海 桑田碧海 (そうでんへきかい) the world is a scene of constant changes (as a mulberry field changing into a blue sea) Jinuma: Japanese Dictionary · Word lists