Surname Tatsutaka (Tatsutaka 
, Хосокава 
) , throughout the world, is an extremely rare cognomen. The surname Tatsutaka is habitual in Eastern Europe, particularly Russia, where it is an extremely rare surname. Much more prevalently, Tatsutaka is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Tatsutaka | Japan |
| Хосокава | Russia |