is a dish of the

Ainu people The Ainu are the indigenous people of the lands surrounding the Sea of Okhotsk, including Hokkaido Island, Northeast Honshu Island, Sakhalin Island, the Kuril Islands, the Kamchatka Peninsula and Khabarovsk Krai, before the arrival of the Y ...

of northern Japan, consisting of

seafood Seafood is any form of sea life regarded as food by humans, prominently including fish and shellfish. Shellfish include various species of molluscs (e.g. bivalve molluscs such as clams, oysters and mussels, and cephalopods such as octopus an ...

that is frozen outdoors, sliced like

sashimi is a Japanese delicacy consisting of fresh raw fish or meat sliced into thin pieces and often eaten with soy sauce. Origin The word ''sashimi'' means "pierced body", i.e. "刺身" = ''sashimi'', where 刺し = ''sashi'' (pierced, stuck) ...

, and served with

soy sauce Soy sauce (also called simply soy in American English and soya sauce in British English) is a liquid condiment of Chinese origin, traditionally made from a fermented paste of soybeans, roasted grain, brine, and '' Aspergillus oryzae'' or ''Asp ...

and

water pepper ''Persicaria hydropiper'' ( syn. ''Polygonum hydropiper''), also known as water pepper, marshpepper knotweed, arse smart or tade, is a plant of the family Polygonaceae. A widespread species, ''Persicaria hydropiper'' is found in Australia, New Z ...

References

Ainu cuisine Salmon dishes {{ainu-stub