I read an article on a gaming website that said the devs aren't planning on a sequel or any dlc which is very disappointing. In the epilogue something was said that appeared to hint that a sequel was possible and I was hoping it was true but apparently at this time it isn't. This was a very enjoyable game with a well developed story and I hope the devs will reconsider.
Yes, there is a sequel.
See Asobo next project here
Observe what is that symbol on the boat body? sound familiar? dear alchemist?