INM culture is originally been created by Japanese, as one kind of kichiku, usually includes artificial vocaload and voice mad.
Its main characters usually are gay porn stars in the bad quality gay porn series "仲夏夜の淫梦" made by Japanese porn video company ACCEED. Due to their bad perform skills looks fun been remaked as jokes. Nowadays new stars who also did bad jobs in porn videos like Qing Dynasty Royal Highness. But the most popular ones still old one like Tadokoro Koji,Mahiro Tokugawa,Tatsuya Gashuin,Shingen Takeda......