Search gender: all male female Saiju Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: saiju Katakana: サイジュ 0 Kanji: 彩樹 Meaning: 彩To color. Add color. A combination of various colors. To make up. Pattern. Luster. Brilliance. Appearance. Figure. 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 > Saiju Boy Name Meaning, Kanji Variations.