Search gender: all male female Ishu Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: ishu Katakana: イシュウ 0 Kanji: 唯秀 Meaning: 唯That's it. Just one. Only. A word expressing limitation or emphasis. Reply. A reply of acceptance that is answered immediately. 秀To excel. To excel. To grow. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Ishu Boy Name Meaning, Kanji Variations.