Search gender: all male female Sema Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: sema Katakana: セマ 0 Kanji: 勢馬 Meaning: 勢Momentum 馬Horse. A metaphor for something big. A metaphor for something lowly. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Sema Boy Name Meaning, Kanji Variations.