Family name Исигаки (Ishigaki 
, Исигаки) , throughout the world, is a rare cognomen. The last name Исигаки is habitual in Paraguay, where it is quite a rare surname, Austria, where it is a rare surname, and Singapore. Measured by absolute frequency, it is the most numerous in Brazil, Japan, and Paraguay. Much less frequently, Исигаки is the forename as well as the last name.