The giant. For those was wondering why Korean stories often used Japan as the enemies or places for something evil done, well... it has to be because of the past where Japan doing a lot of invasion to other countries, Korean included.
So casually. Just like that. Like they have done it a couple of times already.
And what is with "I can see it."
I know the manga already make a big deal of the shogi. But I don't think it will come from a damn puzzle.