Cognomen Ryosuke (Ryosuke 
, リョウスケ , Рёсуке 
) , worldwide, is a common last name. The cognomen Ryosuke is habitual in Japan, where it is quite a common surname, Malaysia, where it is a very rare surname, and Indonesia. Not in comparison with a country's population, the name is most common in Japan, China, and Indonesia. Much less frequently, Ryosuke is the forename as well as the last name.