Katsuo (written: 勝男, 勝夫, 勝雄 or 嘉葎雄) is a masculine Japanese given name. Notable people with the name include: ... Found on http://en.wikipedia.org/wiki/Katsuo
This small tuna (6 to 8 pounds) has a light-colored meat similar to yellowfin. 'Katsuo' is the Japanese name for this fish. The Hawaiians call it 'aku.' Found on https://www.encyclo.co.uk/local/20110