Pachinko (パチンコ): History

Pachinko machines were first built during the 1920s as a children's toy, then emerged as an adult pastime in Nagoya around 1930. All of Japan's pachinko parlors were closed down during World War II, but re-emerged in the late 1940s and have remained popular since then.

From Wikipedia's

 

Pachinko Pachinko History Functioning