Search gender: all male female カイジュオウ Japanese Boy Names Variations. 1 names found. gender: all male female Name: kaijuo Katakana: カイジュオウ 0 Kanji: 海樹皇 Meaning: 海Sea. Wide and large. A place where many people and things gather. A large lake or pond. A large lake or pond. A frontier. The end of the earth. 樹Trees. General term for plants. To plant a tree. To set up. To stand firmly. 皇Emperor. King. Monarch. Japan. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > カイジュオウ Japanese Boy Names Variations.