The Diet revised the adult entertainment business law on Wednesday to enable dance clubs to operate past midnight if they meet certain conditions.

The revision came after individuals from the music industry such as performer and composer Ryuichi Sakamoto, a prominent lobbyist, launched a campaign to revise the 1948 law, criticizing the fact that dance clubs were lumped in to the same category as sex parlors.

Under the revised law, a club would not be defined as an "adult entertainment" business if it has illumination of more than 10 lux — roughly corresponding to that inside a movie theater during intermission.