Family name Омори (小森 
, 大森 , Omori 
) , around the globe, is quite a common surname. The last name Омори is habitual in Kenya, where it is quite a rare surname, Japan, where it is a rare surname, and Nigeria. Measured by absolute frequency, it is the most numerous in China, Nigeria, and Kenya. Also, Омори is the forename as well as the last name.