Search gender: all male female クロイチ Japanese Boy Names Variations. 1 names found. gender: all male female Name: kuroichi Katakana: クロイチ 1 Kanji: 玄一 Meaning: 玄Black color. Black with a reddish tinge. Dark. The color of heaven. Deep. Distant. Far away. 一One. The first. Kanji for the number 1 (one). To be the most superior. To begin, to put things together. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > クロイチ Japanese Boy Names Variations.