Surname 利久 (利久 
, Toshihisa 
) , across the world, is a rare cognomen. The last name 利久 is characteristic of Japan, where it is a rare surname, China, where it is a very rare surname, and Germany, where it is an extremely rare surname. Measured by absolute frequency, the name is most common in Japan, China, and Mexico. Likewise, 利久 is the forename as well as the last name.