Japanese train models and building kits come with stickers, not decals as I have been used to working with. At first I found these hard to work with but after repeated attempts and trying different techniques, I have been getting better results. These stickers are colorful and add quite a bit of realism to the finished structure.
The back side of this particular set of stickers had a foil look to it. Later an accidental scratch on the front of the sheet revealed the same foil look suggesting that this is a foil sticker.