Search gender: all male female ナナセイ Japanese Girl Names Variations. 1 names found. gender: all male female Name: nanasei Katakana: ナナセイ 0 Kanji: 七生 Meaning: 七Seven. Seventh. Kanji character for the number 7 (seven). Many times. 生Live. To be born. Born. To grow. Life. A living thing. Pure. Unadulterated. Fresh. Unprocessed. Unripe. A person who is learning or practicing. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > ナナセイ Japanese Girl Names Variations.