Last name Икуо (Ikuo 
, Икуо 
) , all over the world, is quite a rare cognomen. The last name Икуо is characteristic of Japan, where it is a rare surname, Belgium, where it is a very rare surname, and Tanzania. Measured by absolute frequency, it is the most numerous in Japan, China, and Nigeria. Likewise, Икуо is the forename as well as the last name.