Last name Tatsuya (Tatsuya 
, Татсуя 
, ทัตสึยะ 
) , around the world, is quite a rare cognomen. The last name Tatsuya is habitual in Japan, where it is quite a rare surname, Singapore, where it is a rare surname, and Taiwan. Not in comparison with a country's population, it most frequently occurs in Japan, China, and Indonesia. Also, Tatsuya is the forename as well as the last name.