One piece is still going weekly while those three are just on hiatus for most of the time (even if One Piece goes on for another 10 years) at least we will get chapters. D gray man is been published quarterly after the mangaka came back from a long hiatus (she is probably still adapting, maybe it will eventually become monthly or bi monthly when she is better, so i expect it to concluded during her lifetime) Mangaka of d gray man is also a lot younger when compared to those the mangaka of those 3
8 years. The boat was 8 years...... Been waiting a long time to post this link. This topic finally gave me a reason.