J (J) opened in 2003 and is part of the J Group, one of the largest club groups in Ginza. The interior of the club is one of the largest in Ginza, covering an area of nearly 100 tsubos. It is characterized by the fact that it is not an owner-mother's club, but is governed by a number of employed mothers. The fact that it has been in stable operation for more than 20 years suggests that the level of the mothers, hostesses, and black-clad staff is high.