Logbook is a feature in Grand Blue that provides information about Cursed Fruits, Titles, and Islands.
Fruits
The Fruits section lists the following Cursed Fruits:
Titles
The Titles section displays 28 Titles across two pages. Each entry includes its name, a short description, and its unlock status. Titles that have not been obtained are marked Locked. Arrow buttons allow players to move between the pages. Descriptions explain or hint at the accomplishments associated with each title, including mastering fruits, achieving crew rankings, and completing world events. Some titles, such as Admiral, Fleet Admiral, Emperor, and Pirate King, are held only while the player's crew maintains the required ranking.
Islands
The Islands section lists locations in the game's world. The following islands appear in the Logbook in the beginning: