Search gender: all male female Uimu Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: uimu Katakana: ウイム 0 Kanji: 初夢 Meaning: 初For the first time 夢Dream. Something you see as if it were real when you are asleep. Something you hope to achieve in the future. A pleasant thought that takes you away from reality. Something fleeting. Uncertainty. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Uimu Boy Name Meaning, Kanji Variations.