Yakyuken is a kind of Japanese

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...

 Rock-scissors-paper based on the chant that is sometimes sung in Japanese matches where clothing loss is involved. The game actually origined from a kind of Japanese folk dance in Shikoku

Shikoku

is the smallest and least populous of the four main islands of Japan, located south of Honshū and east of the island of Kyūshū. Its ancient names include Iyo-no-futana-shima , Iyo-shima , and Futana-shima...

, but became as a part of porn

PORN

Porn is a common short form for pornography. It may also refer to:* Progressive outer retinal necrosis, a disease of the retina* PORN, a French industrial rock band...

 culture in Japan and some other Asian

Asia

Asia is the world's largest and most populous continent, located primarily in the eastern and northern hemispheres. It covers 8.7% of the Earth's total surface area and with approximately 3.879 billion people, it hosts 60% of the world's current human population...

 countries after the influence of TV variety show

Variety show

A variety show, also known as variety arts or variety entertainment, is an entertainment made up of a variety of acts, especially musical performances and sketch comedy, and normally introduced by a compère or host. Other types of acts include magic, animal and circus acts, acrobatics, juggling...

. In North America

North America

North America is a continent wholly within the Northern Hemisphere and almost wholly within the Western Hemisphere. It is also considered a northern subcontinent of the Americas...

, there is a little studio named Lost-bets makes a great amount of films about strip game including Yakyuken.