One Piece Log books, commonly called Logs by fans, are big sized One Piece magazines that include an average of 30 manga chapters, along with some additional information pages. They have the same format as the Weekly Shonen Jump, but they are entirely dedicated to only one series: One Piece. As such, chapters retain their colored pages / posters and logs even offer supplemental postcards or special tankōbon bookcovers. Each Log has a subtitle giving a hint of the arcs it covers.