Besides instant noodles and Japanese pornography, karaoke probably has had the biggest cultural impact on Hong Kong of any Japanese invention. Whether their influence is healthy is a different matter. Periodic large-scale karaoke competitions have been held in Hong Kong - in 1993, 1995, 1999 and 2005. For most people, letting the contest series die a quiet death was probably a good idea. But the organisers think otherwise. So here it is - the 2010 joint Japanese-Hong Kong karaoke contest, jointly run by the Japanese consulate, Hongkong Japanese Club and Japan Universities Alumni Society Hong Kong, among others, has been revived. As set by tradition, Hong Kong contestants must sing Japanese songs, while their Japanese counterparts will do Canto-pop and Putonghua hits. The results have been likened to the Rocky Horror Picture Show. Sign up at www.juas.hk . But do it fast - the deadline is tomorrow.