Search gender: all male female Isuo Boy Name Meaning, Kanji Variations. 1 names found. gender: all male female Name: isuo Katakana: イスオ 0 Kanji: 一壽男 Meaning: 一One. The first. Kanji for the number 1 (one). To be the most superior. To begin, to put things together. 壽Long life. Life. Age. Celebration. Celebration of long life. 男Male. Adult male. Son. You can save your favorite names with NAZUKE PON > About Japanese Names > Search For Japanese Names > Isuo Boy Name Meaning, Kanji Variations.