Masahiro Nakai, one of Japan's top TV hosts and a former pop star, says he is retiring to take responsibility over sexual assault allegations.

Nakai’s decision came following reports that he engaged in non-consensual sexual activity with a woman that led to a settlement with the victim.

Japanese TV host Masahiro Nakai, one of the most prominent figures in Japan's entertainment industry, has announced his retirement following a sexual assault allegation that has caused shockwaves throughout the country.