Search gender: all male female Mitsusumi Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: mitsusumi Katakana: ミツスミ 0 Kanji: 慎純 Meaning: 慎Modesty. Not lightly. Sincere. Seriousness. A metaphor for someone who is considerate of others. To restrain oneself. 純Pure. Unpretentious. To be in one's natural state. Raw silk. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Mitsusumi Name Meaning, Kanji Variations.