Search gender: all male female Seikitsu Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: seikitsu Katakana: セイキツ 0 Kanji: 誠橘 Meaning: 誠True. A heart without lies and falsehoods. Sincerity. Truly. 橘Tachibana mandarin (a kind of fruit tree). A small evergreen tree of the mandarin family, Tangerines. One of the citrus fruits. One of the family crests. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Seikitsu Name Meaning, Kanji Variations.