Surname コヤナギ (コヤナギ 
, Koyanagi 
) , globally, is quite a rare family name. The surname コヤナギ is characteristic of Isle of Man, where it is quite a rare surname, Canada, where it is a rare surname, and Singapore. Measured by absolute frequency, it is commonest in Japan, the United States, and Indonesia. More frequently, コヤナギ is the forename as well as the last name.