Search gender: all male female トヨサブロウ Japanese Boy Names Variations. 1 names found. gender: all male female Name: toyosaburo Katakana: トヨサブロウ 0 Kanji: 豊三郎 Meaning: 豊Abundance. Large in quantity. Large. full. To make crops grow well. 三Three. The third. Kanji to represent the number 3 (three).Again. Again and again. Many times. 郎Male. Men. Young men. A word that refers broadly to boys. A retainer. You can save your favorite names with NAZUKE PON > About Japanese Names > Search Japanese Names By Kanji > トヨサブロウ Japanese Boy Names Variations.