Im almost positive its Japanese. The female is definitely of Japanese decent and the instrument used to tickle her is used for tickling by the Japanese. I know it looks like a paintbrush but it had as specific name and use for them(not tickling, but something else). Im not sure what the site is but I think its the DarkWater site that has pics of Japanese girls being tickle tortured as well as a description of the brush. You can also tell by the expression on her face. Playful anime has a laughing expression but realistic Japanese drawings like that almost always portray the ticklee with a suffering look. So, there ya go. Italian Tickler