Abstract
The fucoidan and alginic acid content from Tinocladia crassa which is cultivated at Fukuoka Prefecture to confirm the proper period of its harvest was estimated quantitatively. And the chemical composition of the fucoidan was characterized. Since the fucoidan and alginic acid content was substantially constant, the period of harvest can be judged by the dirt, color, and slime of alga. The cultivated T.crassa contained twice the galactose of fucose. It was suggested the fucoidan was rare type which was different from the typical ones.
