Search gender: all male female ライトウ Japanese Boy Names Variations. 1 names found. gender: all male female Name: raito Katakana: ライトウ 0 Kanji: 雷刀 Meaning: 雷Thunder. Something that is known to the world. A weapon of great explosive power. 刀Sword. A long, thin, single-edged weapon. A long sword against a small sword. A small sword against a long sword. A scalpel used in dissection and surgery. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > ライトウ Japanese Boy Names Variations.