Sakura denbu （桜田麩) is a sweet-salty, fluffy pink flaked fish condiment - a sort of fish furikake - that is used in sushi rolls as well as to decorate various rice dishes. It's used quite often in spring, because of its dainty appearance and cherry-blossom pink color. (Sakura means cherry blossom or tree.) You can buy it in little packets at any Japanese grocery store, but commercial sakura denbu usually has MSG and various preservatives in it. Plus, it's rather expensive at my local Japanese grocery store. So, here's a homemade sakura denbu recipe to use in your springtime bentos.
It's not that difficult to make, but there are some key points to pay attention to to produce the desired fluffy texture, so I've included a lot of procedural photos. Make sure to choose a fairly low-fat white fish for this; a high fat fish like salmon will clump up and not produce the fine flakes that are characteristic of denbu.