Search gender: all male female Seisui Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: seisui Katakana: セイスイ 0 Kanji: 青水 Meaning: 青Blue. A general term for blue, such as indigo and navy blue. A metaphor for youthfulness. Immaturity. 水Water. Something liquid. Sea, river, swamp, lake, spring, etc. To work with water. To moisten. To soak in. You can save your favorite names with NazukePON > About Japanese Names > Search For Japanese Names > Seisui Name Meaning, Kanji Variations.