I never used to keep canned stuff except the staples like tomatoes and beans...always cooked stuff from scratch but since the earthquakes started and especially after big ones...I think many people decided they needed to review how they stocked their cupboards...especially after the Feb quake last year and the ports were knocked out...so supplies didn't get through.
Now although I still tend to have most things frozen my tinned stock has increased...the advice is get your family through 3 days because that may be how long it takes for them to get to you...I reckon between us and our friends we could do that and a lot more.
Tinned
Tomatoes (whole..I don't but the chopped so I can decide whether they need to be chopped at the time or not..if they're chopped already I can't reverse that process).
Beans of all kinds (baked, Canellini, Adzuki)
Chick peas
Soups - a few kinds
Tuna
Fruit
Condensed Milk
Custard Powder
Then on top of that we have those cardboard foil lined packs with things like sauces in. Normally make sauces from scratch but every now and again they do come in handy ...usually end up using them as they get near to date and then replace them for the emergency pack.
In the same kinda vein we also keep in supplies of rice and pasta and flour etc (keep them in nappy buckets that have water tight lids...everything keeps longer then and you can stack them