Search gender: all male female Nishio Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: nishio Katakana: ニシオ 0 Kanji: 西男 Meaning: 西West. One of the directions. The direction in which the sun sets. Western countries, Europe. 男Male. Adult male. Son. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Nishio Boy Name Meaning, Kanji Variations.