Items are obtained from stores and NPCs. Neku and his partners use these to make their journey easier by equipping or using them. They usually allow for changes in character stats, a greater range of options or to bypass Reaper Walls or other such barriers.
While the item inventory variety is unlimited, the limit of the number of any one item is 99, with other items having preset limits depending on in-game quantity. You can sort through the different item types by touching one of the small buttons above the part of the bottom window which lists individual items. The order is Hats, Shirts, Pants, Suits, Shoes, Accessories (all of which are Threads), Food and Swag. All items are used from the Items Menu.
There are 3 main types of items: