Surname ナルカワ (ナルカワ 
, Narukawa 
) , all over the world, is a rare family name. The family name ナルカワ is habitual in Japan, where it is a very rare surname, Brazil, and Philippines, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Japan, Brazil, and the United States. More frequently, ナルカワ is the forename as well as the last name.