Yasuo is a popular Japanese given name of unknown origin, though it's often believed to be derived from the name of the prominent Japanese samurai, Yasuke, who served under the warlord Oda Nobunaga in the 16th century. The name Yasuo has been traditionally used for both boys and girls, but it is more commonly given to males in modern times. It consists of two kanji characters: "Yasu" (安) which means peaceful or calm, and "O" (雄) which signifies courage or bravery. Thus, the name Yasuo can be interpreted as someone who is peacefully brave or calmly heroic.
"The name Yasuo experienced peak popularity between 1918 and 1920 with 15 to 21 births each year, before declining to single digits by the mid-1930s, with a recent resurgence in 2023."