User blog comment:Jopjopjop/Volume 18 Spoilers/@comment-3965848-20140715170854/@comment-202.152.195.69-20140715180207

How did you get that conclusion?? The third arc consists 5 volumes (SS not included) and The forth arc up until now is still in 4 volumes (SS not included) and Ishibumi tends to increase the amount of volumes each arc. So no, I think we are still nowhere from "the last volume of the 4th arc"