Family name トシヒコ (Toshihiko 
, トシヒコ , Tosihiko ) , all over the world, is a common last name. The cognomen トシヒコ is habitual in Japan, where it is quite a common surname, Taiwan, where it is a rare surname, and Poland, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in Eastern Asia, particularly Japan, China, and Taiwan. Much less frequently, トシヒコ is the forename as well as the last name.