Masao

Masao is a traditional Japanese masculine name composed of the elements 'masa' meaning 'correct' or 'righteous' and 'o' meaning 'male' or 'man.' This name embodies qualities of honor, integrity, and moral righteousness that are highly valued in Japanese culture. Masao gained popularity throughout the early and mid-20th century in Japan, though its usage has declined somewhat in recent decades as parents have opted for more modern naming choices. Outside of Japan, the name remains relatively uncommon but is recognized within Japanese diaspora communities. Masao has historical significance as it was borne by several notable Japanese artists, athletes, and business leaders throughout the 20th century.

Pronounced mah-SAH-oh.

As of October 2026, Masao ranked #13420 for boys in US births in 2019 SSA, peaked at #705 for boys in 1918.