Hokuto no Ken: Last Piece

A special 30th anniversary chapter of the series, it takes place between Chapters 136 and 137, filling the timeline gap between the conclusion of the Last Nanto General arc and the start of the Tentei arc. Originally released as a two-part story in the May and June 2014 issues of Comic Zenon, it was later compiled in Volume 11 of the Extreme Edition (kyūkyokuban) of the manga.