Originally Posted by Northbank
Manga rights are notoriously hard to pin down with often multiple rights holders across multiple companies. I've seen studios take up to two years to sort it out. Someone saying they are the rights holder does not always make it 100% so. I don't know this specific manga but the general advice here is to move on.
I understand what you are saying, but in this case the author is the sole owner and has even stopped the publisher from publishing his award winning 10 million copies sold work, he has put it online for free and has put out a statement that anyone can use his novel to create a derivative work in film, television, and merchandise