Cognomen Manzaki (Manzaki 
) , in the entire world, is a very rare last name. The family name Manzaki is characteristic of Japan, where it is a very rare surname, Malaysia, where it is an extremely rare surname, and the United States. Not in comparison with a country's population, it is the most numerous in Japan, India, and Malaysia. Much less frequently, Manzaki is the forename as well as the last name.