Many rare and powerful items are hidden on battlefields or dropped by specific enemies. The 'Move-Find Item' movement ability (Chemist Job Level 2) is essential for finding hidden treasures on battle maps. These items are often located on specific tiles, sometimes requiring high 'Jump' or 'Move' stats to reach.
Certain enemies also have rare item drops or can be poached for unique gear. For example, the 'Genji Equipment' set can be obtained from specific enemies in the Deep Dungeon. Consult online resources or detailed maps for precise locations of hidden items. save before attempting to find rare items, as some are one-time opportunities.