Tokoroten (心太, ところてん) is a gelatinous dish in Japanese cuisine, made from agarophyte seaweed.It was traditionally made by boiling tengusa (Gelidium amansii) and allowing the mixture to congeal into a jelly.[citation needed] Tokoroten can be eaten hot (in solution) or cold (as a gel).In the present day, it is common to eat it with a mixture of vinegar and soy sauce,[3] and sometimes nori,[4] hot pepper, or sesame.[2] In the 17th century, it was discovered that freezing tokoroten would result in a stable and dry product known as kanten (agar).