Rice Vinegar

Rice vinegar/sushi seasoning or komesu [米酢] flavors the rice. Seasoned rice vinegar can be used with a little sugar or regular rice vinegar with salt and sugar. I prefer Mitsukan brand.

See wiki page here.
Regular Seasoned

Nori - Dried seaweed sheets

Nori [海苔] is a key ingredient to sushi. Yes, it is dried seaweed, but with sushi it tastes good~!
See wiki page here.

Sriracha Hot Chili Sauce

The secret ingredient when it comes to spice. It is a chili sauce, so use it sparingly; it is very hot! Commonly used in Dynamite rolls, Bakudan rolls, Firefly rolls ect.
See wiki entry here.