Search gender: all male female Kaiju Girl Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: kaiju Katakana: カイジュ 0 Kanji: 海樹 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. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Kaiju Girl Name Meaning, Kanji Variations.