<I repost this since I forgot to crosspost it to fj.soc.politics. I
expect more replies from there>

If you have ever been to Japan, you may have seen Pachinko(small
pinball) parlors stand in the front of almost every major Japanese
train station.

And those Pachinko parlors are the business that the Koreans in Japan
own.

Subsequently to the surrender of the WW2, and the devastation caused
by the carpet bombings, the Koreans, including those illegal entrants,
had started to insist that the Koreans are the victor nations, as
SANGOKUJIN, and then started to lynch the Japanese citizens.

Japanese police and the public peace could not do anything against
those rowdy Korean thugs because they had extraterritoriality.

Japanese government had lost all the orders and controls of its nation
at that period. Those Koreans had taken the maximum advantage of 
extraterritoriality and then they kidnapped those landlords who had
been owning the real estates located in the front of major train
stations in major Japanese cities, lynched them, slaughtered them then
stole their real estates.

Those Koreans are the origin of modern yakuza of post-war period. The
Koreans always justify those brutal acts by blaming IJA's atrocities
in the wartime, and they insist that those crimes are the justified
revenge.

I have no clue why GHQ didn't stop them and arrest them. Does anyone
know why?

It is well-known that the money earned by the Pachinko business is
being transferred to North Korea via the Korean federation(Chosen
Soren) in Japan.

Also, is there any Japanese person who has further details about this
issue than me, or who has any knowledge about this SANGOKUJIN issue?
If there is any, I want you to enlighten me about what exactly
happened at that time.