Search gender: all male female Kahachi Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: kahachi Katakana: カハチ 0 Kanji: 嘉八 Meaning: 嘉Splendid. Excellent. Beautiful. Congratulations. Happy. Rejoice. Enjoy. Praise. 八Eight. Eighth. Kanji character for the number 8 (eight). A number one more than seven. A large number of people. It is said to be a lucky number because of its shape. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Kahachi Boy Name Meaning, Kanji Variations.