Surname Japon (Japon 
, Jepang 
, Japão 
) , all around the world, is quite a common family name. The cognomen Japon is habitual in Algeria, where it is quite a rare surname, Philippines, and Spain, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Philippines, Indonesia, and Algeria. Much less frequently, Japon is the forename as well as the last name.