Designing an RPG Inventory System That Fits: Preliminary Steps

https://gamedevelopment.tutsplus.com/articles/designing-an-rpg-inventory-system-that-fits-preliminary-steps--gamedev-14725

RPG JRPG MMO inventory

A guide to designing your game's inventory sytsem so that it fits the target game experience and setting, starting with a look at four popular inventory systems (including JRPG, unlimited items, and grid-based systes), and then a process to design your own suitable inventory.