I don't try to incite anything. I was just curious why it seemed common in Japanese entertainment. I didn't look up "incest" on Google, the movie and two of the anime were on Crunchyroll.com and the other one was on Animefreak.tv, two websites that I commonly use. Don't remember the titles of the ones on Crunchyroll but, that site has removed most of its anime, you might find the movie though (like i said, that one was too much and I didn't finish it). The one on Animefreak was called Kiss x Sis (episode 1). All three anime were/are categorized as "comedy," the movie was "drama."