The Grandline Series is the closest thing Banpresto has to a house One Piece line. Banpresto calls it the standard One Piece figure series, simple and unique, the personality carried in a character's expression and pose, and it has turned out roughly 17cm prize figures of the cast for well over a decade. The banner splits the roster by gender: The Grandline Men for Luffy and the male crew, The Grandline Lady for Nami, Robin and the women.

It runs by volume rather than by wave, numbered entries stacking up year after year, and for most of its life it has shared a name with the DXF format, releases often billed as DXF The Grandline Men or Lady. A Grandline Men entry numbered volume thirteen was already shipping in 2012, which places the line's roots back near the end of the 2000s.

These are non-scale prize figures from Banpresto's crane-game channel, the everyday way a One Piece fan adds a crew member to a shelf, and the series is still active, recent GRANDLINE JOURNEY and DXF Grandline entries keeping the cast current into 2026.