Search gender: all male female コクイチ Japanese Boy Names Variations. 1 names found. gender: all male female Name: kokuichi Katakana: コクイチ 0 Kanji: 克一 Meaning: 克Achieve with all your might. Win. Enough. 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 > コクイチ Japanese Boy Names Variations.