Last name Naganobu (Naganobu 
, Асано 
) , around the world, is a rare surname. The cognomen Naganobu is habitual in Japan, where it is a rare surname, Canada, where it is a very rare surname, and Ukraine, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Japan, Canada, and Russia. Much more frequently, Naganobu is the forename as well as the last name.