Search gender: all male female サンジュ Japanese Girl Names Variations. 1 names found. gender: all male female Name: sanju Katakana: サンジュ 0 Kanji: 珊珠 Meaning: 珊A character used for coral. A dendritic calcareous mass formed by the accumulation of skeletons in corals living in the sea. 珠Ball. A round ball that forms inside a shell. A small, round ball, like a pearl. A metaphor for something beautiful or magnificent. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > サンジュ Japanese Girl Names Variations.