Search gender: all male female Kashiwa Girl Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: kashiwa Katakana: カシワ 1 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 NazukePON > About Japanese Names > Search For Japanese Names > Kashiwa Girl Name Meaning, Kanji Variations.