Famicom With Games (Games pictured: Super Mario Bros., Challenger, Door Door, Gradius, Rainbow Islands, Transformers: Mystery of Convoy)
One of the joys of collecting Famicom games over the U.S. versions are the variety of cartridge styles. In America, Nintendo made the cartridge a proprietary item which every company was required to use (this is why unlicensed games, like those made by Tengen or Color Dreams, used different carts).
But in Japan, third parties had greater autonomy, so they could choose different colors or even create their own cartridge style. Konami carts, for example, have more rigid edges and the label stretches to the top of the cart so you can see the title from above.
The small space allowed for imagery gave the FC carts a characteristic feel. It’s iconic enough that there’s an art show in Japan each year where designers have created new FC cartridge art for fake games - it’s pretty neat, actually.