Family name Kooka (Kooka 
) , all over the world, is quite a common cognomen. The last name Kooka is habitual in Japan, where it is quite a rare surname, Kuwait, where it is a rare surname, and Egypt. Measured by absolute frequency, it most frequently occurs in Japan, Egypt, and Saudi Arabia. Much less frequently, Kooka is the forename as well as the last name.
To, Minoru, Mitsuo, Steven, Nobuji, Hamidi, Hajime, Hideki, Zubin, Yayoshi, Mohamed, Satoshi, Akihiro, Kiyoshi, Toyoshi, Hiroshi, Farrokh, Yutaka, Princess, Yukio, Hisao, Ho, Ana, Mars, Akio, Koka, Dela, Omar, Yasuo, Masao, Sadao, Sayed, Ahmed, Karim, Kouka, Kooky, Hideo, Mooka, and Yuichiro