Search gender: all male female 菓 Japanese Boy Names Variations. 1 names found. gender: all male female Name: ruka Katakana: ルカ 0 Kanji: 瑠菓 Meaning: 瑠Lapis lazuli. 菓Confectionery You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > 菓 Japanese Boy Names Variations.