Foodstuffs Needed and Where to get it.

You will need rice, which I will describe in greater detail in the next topic. You will also need the following items, some of which are optional:

nori, toasted seaweed sheets, available even at Von's and other supermarkets now
wasabi, Japanese horseradish mustard, comes in cans of powder, just add water
gari or shoga, sliced ginger, a condiment used to reset the taste buds
shredded daikon radish, optional
su or awaze-zu, sushi vinegar, see Rice section below
imitation crab sticks, for California rolls, pieces will also work if you can't find the sticks
kappa, cucumber -- I usually use the European cucumbers since they are longer and there is less waste
avocado -- make sure they are ripe, the dark-skinned variety is easier to peel
sakura denbu, seasoned shredded cod fish (pink powder)
hari hari zuke, pickled vegetable mix (yellow)
ao shiso no mi, prepared beefsteak plant seeds (green)
shiso sakura, pickled radish and ginger with beefsteak plant (pink)
kampyo, seasoned Japanese gourd (dark yellow)
nametake chazuke, prepared mushrooms
shoyu, soy sauce, mixed with the wasabi for dipping the sushi, low-salt is available now

I usually get my things at the local Hughes Market or Ralph's here in Oxnard, California. Any Japanese or Asian market will have all of this, and a whole lot more. The crab, cucumbers and avocados are available at most markets.