What was the primary source of the Tokugawa shoguns in issuing their edict of 1635

Explanation:

In
the
1630s,
the
Tokugawa
shogunate
took
a
series
of
steps
to
further
restrict
Japan’s
international
contacts.
By  

1639,
the
Dutch
were
the
only
Europeans
permitted
to
come
to
Japan,
and
the
conditions
under
which
they
were  

allowed  to  trade  and  interact  with  Japanese  were  extremely  circumscribed  by  the  Tokugawa  authorities.  The  

following
edict
of
1635
was
issued
by
the
shogunate
to
the
officials
administering
the
busy
port
of
Nagasaki,
the  

site
of
most
of
Japan’s
foreign
contacts
at
the
time.

nigger, that word was originated for white folks   to keep black people under

and when black people use it, they know that's just how they greet each other

and when white folks use it, they know there's a double meaning under