Shima-zushi is made through a process in line with a climate and food situation of islands like using red peppers and mustard instead of wasabi which is unobtainable in the islands.
島で手に入りにくいわさびの代わりに唐辛子や洋がらしを使うなど、島の気候や食糧事情に合わせた製法で作られている。