Sumata is a Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

ese term for a non-penetrative

Non-penetrative sex

Non-penetrative sex is sexual activity without vaginal, anal, or oral penetration, as opposed to the penetrative aspects of those activities...

 sex act popular in Japanese brothel

Brothel

Brothels are business establishments where patrons can engage in sexual activities with prostitutes. Brothels are known under a variety of names, including bordello, cathouse, knocking shop, whorehouse, strumpet house, sporting house, house of ill repute, house of prostitution, and bawdy house...

s.

Sumata is a form of frottage

Non-penetrative sex

Non-penetrative sex is sexual activity without vaginal, anal, or oral penetration, as opposed to the penetrative aspects of those activities...

, performed by a female sex worker

Sex worker

A sex worker is a person who works in the sex industry. The term is usually used in reference to those in the sex industry that actually provide such sexual services, as opposed to management and staff of such industries...

 upon a male client. The sex worker rubs the client's penis

Penis

The penis is a biological feature of male animals including both vertebrates and invertebrates...

 with her hands, thighs (intercrural sex

Intercrural sex

Intercrural sex , also known as femoral/interfemoral sex/intercourse, is a type of non-penetrative sex, in which a male places his penis between his partner's thighs , and thrusts to create friction.-Heterosexuality:The sex education and sexual experimentation of adolescents may feature intercrural...

), and labia majora

Labia majora

The labia majora are two prominent longitudinal cutaneous folds that extend downward and backward from the mons pubis to the perineum and form the lateral boundaries of the pudendal cleft, which contains the labia minora, interlabial sulci, clitoral hood, clitoral glans, frenulum clitoridis, the...

. The goal is to stimulate ejaculation

Ejaculation

Ejaculation is the ejecting of semen from the male reproductory tract, and is usually accompanied by orgasm. It is usually the final stage and natural objective of male sexual stimulation, and an essential component of natural conception. In rare cases ejaculation occurs because of prostatic disease...

 without penile-vaginal penetration

Sexual penetration

Sexual penetration is a sexual activity that involves the entry into a bodily orifice, such as the vagina, anus or mouth, with a body part or an object....

. This activity circumvents the of 1956, which prohibits sexual intercourse

Sexual intercourse

Sexual intercourse, also known as copulation or coitus, commonly refers to the act in which a male's penis enters a female's vagina for the purposes of sexual pleasure or reproduction. The entities may be of opposite sexes, or they may be hermaphroditic, as is the case with snails...

for money.