Ant yes the bain of my life

You can't do much to erridacate them, all you can do is control them,
year on year.
Leaving the nests alone (outside) is good advice.
However, they get under the floor (even a concrete base) and come up through skirting board joints and door frames.
you could try thin beads of washing up liquid straight into and around
( as they wont cross it) the areas but this can get messy if you are not careful.
Another cheap suggestion is to place half an orange (etc.)
out of the way but close,
to the activity, (Behind the kick boards in the kitchen perhaps?)
they will just head for this and go back and forth to the nest,
this just sorta controls the situation though.
The only real solution is to get a pestie out, should cost you
around £75 they will use an insecticide with residual value, that is, one that
will continue to work after it has dried.
By spraying "barriers" in side and out side, the external walls.
This reduces the amount of "traffic" to and from you house.
Ie window frames, door frames, pipe work outlets are a favourite route)
The trouble with Nippon is that its pretty much a one shot wonder.
The other joy you have to look forward to, is when they fly.
All the ant nests in the area will "synchronise" at a given time,
usually back end of the summer, they take to the wing,
(in their thousands) but this lasts only around 24 hours.
They mate on the wing, the males die fairly soon afterwards (its a sad life

)
The now Queens, land, lose their wings and start a new nest.
And so the cycle continues.................................