Three managers at a popular Roppongi nightclub were arrested during a raid early Sunday for allegedly running a nightclub without a license, police said Monday.

Arrested were Takeshi Obara, the 31-year-old manager of Vanity Restaurant Tokyo, and the club's financial and music equipment managers.

Obara said he "was not aware that his restaurant was violating the (1948 entertainment business) law," the Metropolitan Police Department quoted him as saying.