Pachinko is one of major industries in Japan, selling 30 trillion JPY and 6 percents of Japan's GNP. In another word, Japanese spends 6 % for Pachinko of all the spending.
Pachinko is a kind of gamble, like slot machines, and I sometimes watch people waits in a line before the store opens on Sunday.
Anyway, what attracts so many people? I think it contains something of an addiction though I don't play Pachinko and don't know exactly the attraction.
Pachinko looks like a drug, taking your time and money away, I'd think.