Surname Исикава (石川 
, Ishikawa 
, 石河 , and others...) , in all the world, is a common last name. The last name Исикава is habitual in Reunion, where it is quite a common surname, Japan, where it is quite a rare surname, and Singapore. Measured by absolute frequency, it is the most numerous in Japan, Brazil, and the United States. Much less frequently, Исикава is the forename as well as the last name.