Search gender: all male female Osao Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: osao Katakana: オサオ 0 Kanji: 長夫 Meaning: 長Long. Long distance or interval. A large range of time. Nurture. advantage. Relaxed. Eldest. Things that are at the top. Something that is useless. 夫Husband. A man who is married. An adult male. A full-fledged man. A respectable man. A man engaged in labor. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Osao Boy Name Meaning, Kanji Variations.