Across the world, 利久 (利久 
, Toshihisa 
) is a rare dominantly male, but seldom feminine forename. The first name 利久 is characteristic of Japan, where it is a very rare male name, Brazil, where it is an extremely rare feminine name, and China, where it is an extremely rare masculine name. Likewise, 利久 is the last name as well as the forename.