Cognomen きよし (Kiyoshi 
, きよし) , all around the world, is a common surname. The family name きよし is characteristic of Japan, where it is quite a rare surname, Hong Kong, where it is a rare surname, and Singapore. Not in comparison with a country's population, it is commonest in Japan, China, and Indonesia. Likewise, きよし is the forename as well as the last name.