Search gender: all male female Kashiwa Girl Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: kashiwa Katakana: カシワ 2 Kanji: 柏 Meaning: 柏Japanese Emperor Oak(a kind of tree). General term for evergreen trees of the cypress family. Deciduous tall tree of the beech family. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Kashiwa Girl Name Meaning, Kanji Variations.